Name: liquid-cell transmission electron microscopy for tracking self-assembly of nanoparticles
Uploaded: 2017-10-16T13:00:00
Description: Watch this Scientific Journal Video about Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles at JoVE.com

Prof. Dr. A. Paul Alivisatos Kaliforniya Üniversitesi, Berkeley ve Prof. Taeghwan Hyeon Seul Ulusal Üniversitesi'nde yararlı tartışma için teşekkür ederiz. Bu eser IBS-R006-D1 tarafından desteklenmiştir. W.C.L. minnetle destek (HY-2015-N) Hanyang Üniversitesi Araştırma Fonu kabul eder.

1. nano tanecikleri sentez <ol><li>Platin nano tanecikleri sentezi <ol><li>amonyum hexachloroplatinate(IV) birleştirmek 17,75 mg ((NH 4) 2 Pt (IV) Cl 6), 3.72 mg Amonyum tetrachloroplatinate(II) ((NH 4) 2 Pt (II) Cl 4), tetramethylammonium bromür, poly(vinylpyrrolidone) 109 mg 115.5 mg (MW: 29.000) ve 10 mL 100 mL 3-boyun yuvarlak alt şişesi bir heyecan çizgiyle etilen glikol Kauçuk septum ile donatılmıştır.</li>
		<li>Şişey...

<ol>
	<li>Shevchenko, E. V., Talapin, D. V., Kotov, N. A., O'Brien, S., Murray, C. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Structural+Diversity+in+Binary+Nanoparticle+Superlattices.">Structural Diversity in Binary Nanoparticle Superlattices.</a> Nature. 439, 55-59 (2006).</li><li>Talapin, D. V., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Quasicrystalline+Order+in+Self-Assembled+Binary+Nanoparticle+Superlattices.">Quasicrystalline Order in Self-Assembled Binary Nanoparticle Superlattices.</a> Nature. 461, 964-967 (2009).</li><li>Evers, W. H., Friedrich, H., Filion, L., Dijkstra, M., Vanmaekelbergh, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Observation+of+a+Ternary+Nanocrystal+Superlattice+and+Its+Structural+Characterization+by+Electron+Tomography.">Observation of a Ternary Nanocrystal Superlattice and Its Structural Characterization by Electron Tomography.</a> Angew. Chem., Int. Ed. 48, 9655-9657 (2009).</li><li>Maillard, M., Motte, L., Pileni, M. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rings+and+Hexagons+Made+of+Nanocrystals.">Rings and Hexagons Made of Nanocrystals.</a> Adv. Mater. 13, 200-204 (2001).</li><li>Sztrum, C. G., Rabani, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Out-of-Equilibrium+Self-Assembly+of+Binary+Mixtures+of+Nanoparticles.">Out-of-Equilibrium Self-Assembly of Binary Mixtures of Nanoparticles.</a> Adv. Mater. 18, 565-571 (2006).</li><li>Han, W., Lin, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Learning+From+&amp;#34;coffee+Rings&amp;#34;:+Ordered+Structures+Enabled+by+Controlled+Evaporative+Self-Assembly.">Learning From &amp;#34;coffee Rings&amp;#34;: Ordered Structures Enabled by Controlled Evaporative Self-Assembly.</a> Angew. Chem., Int. Ed. 51, 1534-1546 (2012).</li><li>Bigioni, T. P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Kinetically+Driven+Self+Assembly+of+Highly+Ordered+Nanoparticle+Monolayers.">Kinetically Driven Self Assembly of Highly Ordered Nanoparticle Monolayers.</a> Nat. Mater. 5, 265-270 (2006).</li><li>Govor, L. V., Reiter, G., Parisi, J., Bauer, G. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Self-Assembled+Nanoparticle+Deposits+Formed+at+the+Contact+Line+of+Evaporating+Micrometer-Size+Droplets.">Self-Assembled Nanoparticle Deposits Formed at the Contact Line of Evaporating Micrometer-Size Droplets.</a> Phys. Rev. E. 69, 61609 (2004).</li><li>Kletenik-Edelman, O., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Drying-Mediated+Hierarchical+Self-Assembly+of+Nanoparticles:+A+Dynamical+Coarse-Grained+Approach.">Drying-Mediated Hierarchical Self-Assembly of Nanoparticles: A Dynamical Coarse-Grained Approach.</a> J. Phys. Chem. C. 112, 4498-4506 (2008).</li><li>Kletenik-Edelman, O., Sztrum-Vartash, C. G., Rabani, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Coarse-Grained+Lattice+Models+for+Drying-Mediated+Self-Assembly+of+Nanoparticles.">Coarse-Grained Lattice Models for Drying-Mediated Self-Assembly of Nanoparticles.</a> J. Mater. Chem. 19, 2872-2876 (2009).</li><li>Rabani, E., Reichman, D. R., Geissler, P. L., Brus, L. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Drying-mediated+self-assembly+of+nanoparticles.">Drying-mediated self-assembly of nanoparticles.</a> Nature. 426, 271-274 (2003).</li><li>Loubat, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Growth+and+Self-Assembly+of+Ultrathin+Au+Nanowires+into+Expanded+Hexagonal+Superlattice+Studied+by+in+Situ+SAXS.">Growth and Self-Assembly of Ultrathin Au Nanowires into Expanded Hexagonal Superlattice Studied by in Situ SAXS.</a> Langmuir. 30, 4005-4012 (2014).</li><li>Connolly, S., Fullam, S., Korgel, B., Fitzmaurice, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Time-Resolved+Small-Angle+X-Ray+Scattering+Studies+of+Nanocrystal+Superlattice+Self-Assembly.">Time-Resolved Small-Angle X-Ray Scattering Studies of Nanocrystal Superlattice Self-Assembly.</a> J. Am. Chem. Soc. 120, 2969-2970 (1998).</li><li>Lu, C., Akey, A. J., Dahlman, C. J., Zhang, D., Herman, I. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Resolving+the+Growth+of+3D+Colloidal+Nanoparticle+Superlattices+by+Real-Time+Small-Angle+X-Ray+Scattering.">Resolving the Growth of 3D Colloidal Nanoparticle Superlattices by Real-Time Small-Angle X-Ray Scattering.</a> J. Am. Chem. Soc. 134, 18732-18738 (2012).</li><li>Zheng, H., Claridge, S. A., Minor, A. M., Alivisatos, A. P., Dahmen, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nanocrystal+Diffusion+in+a+Liquid+Thin+Film+Observed+by+in+Situ+Transmission+Electron+Microscopy.">Nanocrystal Diffusion in a Liquid Thin Film Observed by in Situ Transmission Electron Microscopy.</a> Nano Lett. 9, 2460-2465 (2009).</li><li>Jungjohann, K. L., Bliznakov, S., Sutter, P. W., Stach, E. A., Sutter, E. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+Situ+Liquid+Cell+Electron+Microscopy+of+the+Solution+Growth+of+Au-Pd+Core-Shell+Nanostructures.">In Situ Liquid Cell Electron Microscopy of the Solution Growth of Au-Pd Core-Shell Nanostructures.</a> Nano Lett. 13, 2964-2970 (2013).</li><li>Yuk, J. M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-Resolution+EM+of+Colloidal+Nanocrystal+Growth+Using+Graphene+Liquid+Cells.">High-Resolution EM of Colloidal Nanocrystal Growth Using Graphene Liquid Cells.</a> Science. 336, 61-64 (2012).</li><li>Park, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+Observation+of+Nanoparticle+Superlattice+Formation+by+Using+Liquid+Cell+Transmission+Electron+Microscopy.">Direct Observation of Nanoparticle Superlattice Formation by Using Liquid Cell Transmission Electron Microscopy.</a> ACS Nano. 6, 2078-2085 (2012).</li><li>Lee, W. C., Kim, B. H., Choi, S., Takeuchi, S., Park, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Liquid+Cell+Electron+Microscopy+of+Nanoparticle+Self-Assembly+Driven+by+Solvent+Drying.">Liquid Cell Electron Microscopy of Nanoparticle Self-Assembly Driven by Solvent Drying.</a> J. Phys. Chem. Lett. 8, 647-654 (2017).</li><li>Park, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=3D+Structure+of+Individual+Nanocrystals+in+Solution+by+Electron+Microscopy.">3D Structure of Individual Nanocrystals in Solution by Electron Microscopy.</a> Science. 349, 290-295 (2015).</li><li>Chee, S. W., Baraissov, Z., Loh, N. D., Matsudaira, P. T., Mirsaidov, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Desorption-Mediated+Motion+of+Nanoparticles+at+the+Liquid-Solid+Interface.">Desorption-Mediated Motion of Nanoparticles at the Liquid-Solid Interface.</a> J. Phys. Chem. C. 120, 20462-20470 (2016).</li><li>Liu, Y., Lin, X. -. M., Sun, Y., Rajh, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+Situ+Visualization+of+Self-Assembly+of+Charged+Gold+Nanoparticles.">In Situ Visualization of Self-Assembly of Charged Gold Nanoparticles.</a> J. Am. Chem. Soc. 135, 3764-3767 (2013).</li><li>Verch, A., Pfaff, M., de Jonge, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Exceptionally+Slow+Movement+of+Gold+Nanoparticles+at+a+Solid/Liquid+Interface+Investigated+by+Scanning+Transmission+Electron+Microscopy.">Exceptionally Slow Movement of Gold Nanoparticles at a Solid/Liquid Interface Investigated by Scanning Transmission Electron Microscopy.</a> Langmuir. 31, 6956-6964 (2015).</li><li>Sutter, E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+Situ+Microscopy+of+the+Self-Assembly+of+Branched+Nanocrystals+in+Solution.">In Situ Microscopy of the Self-Assembly of Branched Nanocrystals in Solution.</a> Nat. Commun. 7, 11213 (2016).</li><li>Niu, K. -. Y., Liao, H. -. G., Zheng, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Revealing+Dynamic+Processes+of+Materials+in+Liquid+Using+Transmission+Electron+Microscopy.">Revealing Dynamic Processes of Materials in Liquid Using Transmission Electron Microscopy.</a> J. Vis. Exp. (70), e50122 (2012).</li><li>Hermannsd&#246;rfer, J., de Jonge, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Studying+Dynamic+Processes+of+Nano-sized+Objects+in+Liquid+using+Scanning+Transmission+Electron+Microscopy.">Studying Dynamic Processes of Nano-sized Objects in Liquid using Scanning Transmission Electron Microscopy.</a> J. Vis. Exp. (120), e54943 (2017).</li><li>Tsung, C. K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sub-10+nm+Platinum+Nanocrystals+with+Size+and+Shape+Control:+Catalytic+Study+for+Ethylene+and+Pyrrole+Hydrogenation.">Sub-10 nm Platinum Nanocrystals with Size and Shape Control: Catalytic Study for Ethylene and Pyrrole Hydrogenation.</a> J. Am. Chem. Soc. 131, 5816-5822 (2009).</li><li>Cho, K. S., Talapin, D. V., Gaschler, W., Murray, C. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Designing+PbSe+Nanowires+and+Nanorings+through+Oriented+Attachment+of+Nanoparticles.">Designing PbSe Nanowires and Nanorings through Oriented Attachment of Nanoparticles.</a> J. Am. Chem. Soc. 127, 7140-7147 (2005).</li><li>Manthiram, K., Beberwyck, B. J., Talapin, D. V., Alivisatos, A. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Seeded+Synthesis+of+CdSe/CdS+Rod+and+Tetrapod+Nanocrystals.">Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals.</a> J. Vis. Exp. (82), e50731 (2013).</li><li>Woehl, T. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Experimental+Procedures+to+Mitigate+Electron+Beam+Induced+Artifacts+During+in+situ+Fluid+Imaging+of+Nanomaterials.">Experimental Procedures to Mitigate Electron Beam Induced Artifacts During in situ Fluid Imaging of Nanomaterials.</a> Ultramicroscopy. 127, 53-63 (2013).</li><li>Shin, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Growth+Dynamics+and+Gas+Transport+Mechanism+of+Nanobubbles+in+Graphene+Liquid+Cells.">Growth Dynamics and Gas Transport Mechanism of Nanobubbles in Graphene Liquid Cells.</a> Nat. Commun. 6, 6068 (2015).</li></ol>

7 büyüklüğünde Platin nano tanecikleri nm sentez yolu ile amonyum hexachloroplatinate (IV) ve amonyum tetrachloroplatinate (II) Poli (vinylpyrrolidone) (PVP) bir ligand ve etilen glikol kullanarak bir çözücü ve bir indirgeyici27 azaltılması . Bir ligand-Satım tepki oleylamine ile hidrofobik bir çözücü parçacıkları dağıtmak için gerçekleştirildi. Kurşun selenit nano tanecikleri bir selenyum kaynak28 (29 chalcogenide nanocrysta...

Bireysel nano tanecikleri11toplu fiziksel özelliklerine erişmek için bir fırsat sağlar çünkü kendinden montajlı kolloidal nano tanecikleri ilgi olduğunu. En etkili yöntemlerinden birini kendinden montajlı pratik cihaz ölçekli uygulamalarda kullanılan öz bir uçucu solvent6,7,8, buharlaşma yoluyla bir yüzey üzerinde nano tanecikleri kuruluştur 9 , 10 , 11. büyük ölçüde buharlaşma hızı ve nanoparçacık-substrat etkileşimleri değişiklikleri gibi Kinetik faktörlerden etkilenir olmayan işlem bu çözücü buharlaşma yöntemidir. Ancak, tahmin ve Kinetik faktörlerin kontrolü zor olduğundan, kendinden montajlı çözücü buharlaşma tarafından nanopartikül mekanik anlayışı tam olgun değil. İn situ x-ışını saçılması çalışmaları topluluğu ortalama olarak bilgilerinizi vermiş olsa da olmayan nanopartikül kendinden montajlı işlemek12,13,14, bu teknik değil bireysel nano tanecikleri hareket belirlemek ve onların dernek genel yörünge ile kolayca erişilebilir.
Sıvı hücreli TEM bireysel nano tanecikleri, yörüngesini izlemek için bir gelişmekte olan nanopartikül hareketleri inhomogeneity ve katkılarından topluluk davranışları15,16anlamak için bize sağlayan bir araçtır, 17,18,19,20,21,22,23,24,25, 26. Biz daha önce sıvı hücreli TEM solvent sınır hareketi nanopartikül kendinden montajlı Tarih bir substrat18 inducing için büyük bir itici güç olduğunu gösteren çözücü buharlaşma sırasında bireysel nano tanecikleri hareket izlemek için kullanılan , 19. burada, biz nereye biz nanopartikül kendinden montajlı sıvı hücreli TEM kullanma sürecinin gözlemleyebilirsiniz deneyler tanıtmak. İlk olarak, protokoller, Platin sentezi için sağlar ve sıvı-hücre TEM ve nasıl nano tanecikleri sıvı hücreye yüklemek için imalat yordamlar tanıtımı önce selenit nano tanecikleri, kurşun. Temsilcisi sonuçlar kendinden montajlı solvent kurutma tarafından tahrik nanopartikül filmlerin TEM anlık görüntü görüntü görüntüleri gösterir. Bu filmlerde bireysel parçacıkların izleyerek, Çözücü-kurutma-aracılı detaylı mekanizmaları bir tek nanopartikül düzeyde kendinden montajlı anlayabiliriz. Sırasında kendinden montajlı silikon Nitrür penceresinde Platin nano tanecikleri esas olarak uçucu solvent açık hareketin güçlü kılcal kuvvetler ince solvent katman üzerinde hareket nedeniyle izleyin. Benzer olayları da diğer nano tanecikleri (kurşun selenit) ve solvent açık kapiller Kuvvetleri parçacık geçiş bir substrat yakınındaki önemli bir faktör olduğunu belirten yüzeylerde (silikon), için tespit edildi.

<table>
	<tbody>
		<tr>
			<td>ammonium hexachloroplatinate (IV)</td>
			<td>Sigma-Aldrich</td>
			<td>204021</td>
			<td></td>
		</tr>
		<tr>
			<td>ammonium tetrachloroplatinate (II)</td>
			<td>Sigma-Aldrich</td>
			<td>206105</td>
			<td></td>
		</tr>
		<tr>
			<td>tetramethylammonium bromide, 98%</td>
			<td>Sigma-Aldrich</td>
			<td>195758</td>
			<td></td>
		</tr>
		<tr>
			<td>poly(vinylpyrrolidone) powder</td>
			<td>Sigma-Aldrich</td>
			<td>234257</td>
			<td>Mw ~29,000</td>
		</tr>
		<tr>
			<td>ethylene glycol, anhydrous, 99.8%</td>
			<td>Sigma-Aldrich</td>
			<td>324558</td>
			<td></td>
		</tr>
		<tr>
			<td>n-hexane, anhydrous, 95%</td>
			<td>Samchun Chem.</td>
			<td>H0114</td>
			<td></td>
		</tr>
		<tr>
			<td>ethanol, anhydrous, 99.5%</td>
			<td>Sigma-Aldrich</td>
			<td>459836</td>
			<td></td>
		</tr>
		<tr>
			<td>oleylamine, 70%</td>
			<td>Sigma-Aldrich</td>
			<td>O7805</td>
			<td>Technical grade</td>
		</tr>
		<tr>
			<td>lead(II) acetate trihydrate, 99.99%</td>
			<td>Sigma-Aldrich</td>
			<td>467863</td>
			<td></td>
		</tr>
		<tr>
			<td>oleic acid, 90%</td>
			<td>Sigma-Aldrich</td>
			<td>364525</td>
			<td>Technical grade</td>
		</tr>
		<tr>
			<td>diphenyl ether, 99%</td>
			<td>Sigma-Aldrich</td>
			<td>P24101</td>
			<td>ReagentPlus</td>
		</tr>
		<tr>
			<td>selenium powder, 99.99%</td>
			<td>Sigma-Aldrich</td>
			<td>229865</td>
			<td></td>
		</tr>
		<tr>
			<td>tri-n-octylphosphine, 97%</td>
			<td>Strem</td>
			<td>15-6655</td>
			<td>Air sensistive</td>
		</tr>
		<tr>
			<td>Toluene, anhydrous, 99.9%</td>
			<td>Samchun Chem.</td>
			<td>T2419</td>
			<td></td>
		</tr>
		<tr>
			<td>acetone 99.8%</td>
			<td>Daejung Chem.</td>
			<td>1009-2304</td>
			<td></td>
		</tr>
		<tr>
			<td>potassium hydroxide, 95%</td>
			<td>Samchun Chem.</td>
			<td>P0925</td>
			<td></td>
		</tr>
		<tr>
			<td>p-type silicon-on-insulator wafers</td>
			<td>Soitec</td>
			<td>Power-SOI</td>
			<td>for liquid cells with silicon windows</td>
		</tr>
		<tr>
			<td>tetramethylammonium hydroxide, 25% in H2O</td>
			<td>J.T.Baker</td>
			<td>02-002-109</td>
			<td></td>
		</tr>
		<tr>
			<td>AZ 5214 E</td>
			<td>AZ Electronic Materials</td>
			<td>AZ 5214 E</td>
			<td>Positive photorest</td>
		</tr>
		<tr>
			<td>AZ-327</td>
			<td>AZ Electronic Materials</td>
			<td>AZ-327</td>
			<td>AZ 5214 develper</td>
		</tr>
		<tr>
			<td>indium pellets 99.98-99.99%</td>
			<td>Kurt J. Lesker Company</td>
			<td>EVMIN40EXEB</td>
			<td>thermal evaporator target</td>
		</tr>
		<tr>
			<td>1,2-dichlorobenzene, &#62;99%</td>
			<td>TCI</td>
			<td>D1116</td>
			<td></td>
		</tr>
		<tr>
			<td>pentadecane, &#62;99%</td>
			<td>Sigma-Aldrich</td>
			<td>P3406</td>
			<td></td>
		</tr>
		<tr>
			<td>buffered oxide etch 7:1</td>
			<td>microchemicals</td>
			<td>BOE 7-1 VLSI</td>
			<td></td>
		</tr>
		<tr>
			<td>phosphoric acid, 85%</td>
			<td>Samchun Chem.</td>
			<td>P0449</td>
			<td></td>
		</tr>
	</tbody>
</table>

liquid-cell transmission electron microscopy for tracking self-assembly of nanoparticles

Bir nanopartikül dağılım kurutma nano tanecikleri kendi kendine monte yapıları oluşturmak için çok yönlü bir yoldur, ancak bu işlem mekanizması tam olarak anlaşılamamıştır. Derleme işleminin mekanizmasının araştırmak için hücre içi sıvı iletim elektron mikroskobu (TEM) kullanarak bireysel nano tanecikleri yörüngeleri izini var. Burada, biz sıvı hücreli TEM çalışmaları için kullanılan iletişim kurallarını mevcut kendinden montajlı mekanizması. İlk olarak, biz düzgün ölçekli Platin üretmek ve selenit nano tanecikleri kurşun kullanılan detaylı sentetik iletişim kuralları tanıtmak. Daha sonra biz silikon Nitrür veya silikon windows ile sıvı hücreleri üretmek ve yordamlar sıvı hücreli TEM teknik görüntüleme ve yükleme açıklamak için kullanılan microfabrication işlemler mevcut. Birkaç notlar nasıl kırılgan hücre windows yönetmek için de dahil olmak üzere tüm süreci için yararlı ipuçları sağlamak için eklenmiştir. Sıvı-hücre TEM tarafından izlenen nano tanecikleri bireysel hareketleri buharlaşma tarafından neden olduğu solvent sınırlar içinde değişiklikler nano tanecikleri kendinden montajlı işlem etkilenen saptandı. Solvent sınırları bir 2-boyutlu (2D) kendi kendine monte yapısının üretimi için agrega düzleştirme tarafından takip öncelikle form amorf toplamları, nano tanecikleri gittik. Bu davranışları da farklı nanopartikül türleri ve farklı hücre içi sıvı besteleri için gözlenir.

Sıvı hücrenin üst bir çip ve bir alt çip 25 kalınlığında bir elektron ışını için şeffaf silikon Nitrür pencerelerle donatılmıştır oluşur nm. En iyi çip örnek çözümü ve buharlaştırılmış çözücü depolamak için bir depo var. Fişleri25işleme geleneksel microfabrication yapılır. Üst ve alt yongaları için kullanılan maskeler Şekil 1a ' gösterilir ve 1b, anılan ...

Watch this Scientific Journal Video about Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles at JoVE.com

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Hücre içi sıvı iletim elektron mikroskobu nano tanecikleri, kendinden montajlı takibi için

Burada deneysel protokoller gerçek zamanlı gözlem kendinden montajlı işlem için tanıtmak sıvı hücreli transmisyon elektron mikroskobu kullanarak.

Drying a nanoparticle dispersion is a versatile way to create self-assembled structures of nanoparticles, but the mechanism of this process is not fully ...

The overall goal of this procedure is to use liquid-cell transmission electron microscropy to investigate the motion of nanoparticles in the solution phase in real time. This method can help answer key questions in the field of nanoscience, for example, about how nanoparticles form self-assembled structures during solvent drying. The main advantage of this technique is that it makes checking nanoparticle motion in real space and real time possible.The implications of this liquid cell technique is tends towards tracking individual motions of nanoparticles that are not shown by conventional methods. Though this method can provide insight into self-assembly of nanoparticles it can be also applied into other models such as oriented attachment of nanoparticles. To begin the procedure, place in a 100 milliliter three neck round bottom flask 17.75 milligrams of ammonium hexacholoroplatinate, 3.72 milligrams of ammonium tetrachloroplatinate and 115.5 milligrams of tetramethylammonium bromide.Add to the flask 109 milligrams of polyvinylpyrrolidone and 10 milliliters of anhydrous ethylene glycol. Equip the flask with a stir bar, a rubber septum and a reflux condenser. Start the stir motor and while stirring at 1000 rpm, degas the reaction flask under vacuum for one hour.Then, under a flow of argon, heat the reaction mixture to 180 degrees Celsius at 10 degrees per minute. Stir the mixture at 180 degrees Celsius for 20 minutes then allow the mixture to cool to room temperature. Transfer the cooled mixture to a 50 milliliter centrifuge tube.Add to the tube 30 milliliters of acetone to precipitate the platinum nanoparticles. Centrifuge the mixture at 2400 times G for 10 minutes. Discard the supernatant and disperse the precipitate in 10 milliliters of ethanol.Obtain a four inch 100 micron silicon wafer coated with about 25 nanometers of silicon nitride. Load photo resist using a spin coater. Then use photo resist to mount the ultra thin wafer on a 500 micron thick silicon wafer.Spin coat the wafer with 10 milliliters of positive photo resist at 3000 rpm for 30 seconds. Bake the wafer at 85 degrees Celsius for 60 seconds. Then cover the wafer with a chromium mask and expose the wafer to 365 nanometer light for 10 seconds.Immerse the wafer in 50 milliliters of the appropriate developer solution for 40 seconds and then in 50 milliliters of deionized water for one minute. Immerse the wafer in 50 milliliters of deionized water for one minute, then place the patterned wafer in a reactive ion etcher. Etch the exposed silicon nitride for one minute.Use a water bath to evenly heat a container of a 30 milligram per liter aqueous solution of potassium hydroxide to 85 degrees Celsius. Soak the ultra thin wafer in the hot potassium hydroxide for two hours to etch the exposed silicon. When the exposed silicon appears to have been completely etched away, carefully remove the wafer from the solution at an angle to avoid rupturing the silicon nitride window.Repeat this process with the second chromium mask to obtain the top and bottom chips. Use the third chromium mask to pattern indium spacers onto the bottom chip. Align the top and bottom chips and bond the chips together at 100 degrees Celsius.Transfer 20 microliters of the prepared nanoparticle dispersion to a five milliliter vial. Allow the solvent to evaporate under ambient conditions for 10 minutes. Inspect the liquid cell under an optical microscope to verify that the silicon nitride windows are intact.Then disperse the nanoparticles in a mixture of one milliliter of orthodichlorobenzene, 250 microliters of pentadecane and 10 microliters of oleylamine. With the liquid cell under the optical microscope use an injector with an ultra thin capillary to load 100 nanoliters of the dispersion into the liquid cell reservoirs. Use filter paper to absorb the excess dispersion outside the reservoirs.Allow the cell to sit in ambient air for 10 minutes to evaporate the orthodichlorobenzene. Then apply vacuum grease to one side of a two millimeter copper aperture grid with a 600 micron hole. Carefully cover the liquid cell with the grid, being careful to align the aperture with the liquid cell window.Mount the cell in a standard TEM holder and load the cell into the instrument. Acquire images in continuous image acquisition mode as the solvent dries. Use image processing software to calculate the radial distribution function for the particles in each acquired image.TEM images of a platinum nanoparticle suspension drying in a silicon nitride liquid cell showed the nanoparticles being pulled inward by the receding solvent front. This behavior was attributed to the strong capillary forces of the thin layer of solvent and the reduced free energy of the nanoparticles at the solvent interface. The nanoparticles initially formed amorphous multilayer agglomerates as they were drawn together.As the solvent dried, the agglomerates flattened into an ordered monolayer. This ordering is reflected in the radial distribution functions derived from the TEM images. The radial distribution function of the image taken after 90 seconds had a large peak at 8.3 nanometers.The oleylamine capped platinum nanoparticles are about 8.3 nanometers in diameter, suggesting that a significant number of particles were assembled as closely as possible. Once mastered, this technique can be done in two days if it is performed properly. Generally individuals who are new to this method may struggle because fabricating and working with the liquid cell require different levels of optimization for different nanoparticles or liquid cell compositions.While attempting this procedure, remember to protect the windows of the liquid cell from breaking. Following this procedure, other methods like applying voltages to the liquid cell can be performed to answer additional questions about the self-assembly of nanoparticles in the presence of external forces. After its development, this technique paved the way for researchers in the field of nanoscience to explore the assembly process of nanoparticles in the overall dry mechanism.After watching this video, you should have a good understanding of how to prepare liquid cells and measure the motions of nanoparticles in TEM experiment. Don't forget that working with KUH agent can be extremely hazardous. Precautions such as wearing safety glasses should always be taken while performing this experiment.

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