Name: gold nanostar synthesis with a silver seed mediated growth method
Uploaded: 2012-01-15T14:00:00
Description: Watch this Scientific Journal Video about Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method at JoVE.com

Esta pesquisa foi apoiada pela National Science Foundation Parcerias para Pesquisa e Educação em Materiais (PREM) Grant No. DMR-0934218. Ele também foi apoiado por Número Award 2G12RR013646-11 do Centro Nacional de Pesquisa de Recursos. O conteúdo é da exclusiva responsabilidade dos autores e não representam necessariamente a posição oficial do Centro Nacional de Pesquisa de Recursos ou do National Institutes of Health.

1. Prata preparação de sementes <ol><li> Prepare uma solução estoque de nitrato de prata (AgNO 3), tendo uma massa arbitrária e misturando-o com 10 mL de água deionizada (DI). Calcular molaridade da solução. Manter a solução em um lugar escuro para isolá-lo da luz. </li><li> Adicionar 14,7 mg de citrato de sódio tribásico (Na 3 C 6 H 5 O 7) a 10 mL de água DI para fazer uma solução 5 mM. Agitar o frasco até o pó estar dissolvido. </li><li> Adicio...

<ol>
	<li>Irimpan, L., Nampoori, V. P. N., Radhakrishnan, P., Krishnan, B., Deepthy, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Size-dependent+enhancement+of+nonlinear+optical+properties+in+nanocolloids+of+ZnO.">Size-dependent enhancement of nonlinear optical properties in nanocolloids of ZnO.</a> Journal of Applied Physics. 103, (2008).</li><li>Sharma, V., Park, K., Srinivasarao, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Colloidal+dispersion+of+gold+nanorods:+Historical+background,+optical+properties,+seed-mediated+synthesis,+shape+separation+and+self-assembly.">Colloidal dispersion of gold nanorods: Historical background, optical properties, seed-mediated synthesis, shape separation and self-assembly.</a> Materials Science and Engineering: R: Reports. 65, 1-38 (2009).</li><li>El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Some+interesting+properties+of+metals+confined+in+time+and+nanometer+space+of+different+shapes.">Some interesting properties of metals confined in time and nanometer space of different shapes.</a> Accounts of Chemical Research. 34, 257-2564 (2001).</li><li>Daniel, M. C., Astruc, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+nanoparticles:+assembly,+supramolecular+chemistry,+quantum-size-related+properties,+and+applications+toward+biology,+catalysis,+and+nanotechnology.">Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology.</a> Chemical reviews. 104, 293-346 (2004).</li><li>Burda, C., Chen, X., Narayanan, R., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemistry+and+Properties+of+Nanocrystals+of+Different+Shapes.">Chemistry and Properties of Nanocrystals of Different Shapes.</a> Chemical reviews. 105, 1025-1102 (2005).</li><li>Hu, M., Chen, J. Y. X., Li, J. Y., Au, L., Hartland, G. V., Li, X. D., Marquez, M., Xia, Y. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+nanostructures:+engineering+their+plasmonic+properties+for+biomedical+applications.">Gold nanostructures: engineering their plasmonic properties for biomedical applications.</a> Chemical Society Reviews. 35, 1084-1094 (2006).</li><li>Seo, J. T., Yang, Q., Kim, W. J., Heo, J., Ma, S. M., Austin, J., Yun, W. S., Jung, S. S., Han, S. W., Tabibi, B., Temple, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optical+nonlinearities+of+Au+nanoparticles+and+Au/Ag+coreshells.">Optical nonlinearities of Au nanoparticles and Au/Ag coreshells.</a> Opt. Lett. 34, 307-309 (2009).</li><li>Jeong, S., Choi, S. Y., Park, J., Seo, J. -. H., Park, J., Cho, K., Joo, S. -. W., Lee, S. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Low-toxicity+chitosan+gold+nanoparticles+for+small+hairpin+RNA+delivery+in+human+lung+adenocarcinoma+cells.">Low-toxicity chitosan gold nanoparticles for small hairpin RNA delivery in human lung adenocarcinoma cells.</a> Journal of Materials Chemistry. 21, 13853-13859 (2011).</li><li>Huang, X., Jain, P. K., El-Sayed, I. H., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+nanoparticles:+interesting+optical+properties+and+recent+applications+in+cancer+diagnostics+and+therapy.">Gold nanoparticles: interesting optical properties and recent applications in cancer diagnostics and therapy.</a> Nanomedicine. 2, 681-693 (2007).</li><li>Link, S., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Shape+and+size+dependence+of+radiative,+non-radiative+and+photothermal+properties+of+gold+nanocrystals.">Shape and size dependence of radiative, non-radiative and photothermal properties of gold nanocrystals.</a> International Reviews in Physical Chemistry. 19, 409-453 (2000).</li><li>El-Sayed, I. H., Huang, X. H., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Selective+laser+photo-thermal+therapy+of+epithelial+carcinoma+using+anti-EGFR+antibody+conjugated+gold+nanoparticles.">Selective laser photo-thermal therapy of epithelial carcinoma using anti-EGFR antibody conjugated gold nanoparticles.</a> Cancer Letters. 239, 129-135 (2006).</li><li>O'Neal, D. P., Hirsch, L. R., Halas, N. J., Payne, J. D., West, J. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Photo-thermal+tumor+ablation+in+mice+using+near+infrared-absorbing+nanoparticles.">Photo-thermal tumor ablation in mice using near infrared-absorbing nanoparticles.</a> Cancer Letters. 209, 171-176 (2004).</li><li>Nehl, C. L., Liao, H. W., Hafner, J. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optical+properties+of+star-shaped+gold+nanoparticles.">Optical properties of star-shaped gold nanoparticles.</a> Nano Letters. 6, 683-688 (2006).</li><li>Pazos-Perez, N., Rodriguez-Gonzalez, B., Hilgendorff, M., Giersig, M., Liz-Marzan, L. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+encapsulation+of+star-shaped+FePt+nanoparticles.">Gold encapsulation of star-shaped FePt nanoparticles.</a> Journal of Materials Chemistry. 20, 61-64 (2010).</li><li>Sahoo, G. P., Bar, H., Bhui, D. K., Sarkar, P., Samanta, S., Pyne, S., Ash, S., Misra, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Synthesis+and+photo+physical+properties+of+star+shaped+gold+nanoparticles.">Synthesis and photo physical properties of star shaped gold nanoparticles.</a> Colloids and Surfaces A: Physicochemical and Engineering Aspects. , 375-371 (2011).</li><li>Senthil Kumar, P., Pastoriza-Santos, I., Rodriguez-Gonzalez, B., Garcia de Abajo, F. J., Liz-Marzan, L. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-yield+synthesis+and+optical+response+of+gold+nanostars.">High-yield synthesis and optical response of gold nanostars.</a> Nanotechnology. 19, (2008).</li><li>Goodrich, G. P., Bao, L. L., Gill-Sharp, K., Sang, K. L., Wang, J., Payne, J. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Photothermal+therapy+in+a+murine+colon+cancer+model+using+near-infrared+absorbing+gold+nanorods.">Photothermal therapy in a murine colon cancer model using near-infrared absorbing gold nanorods.</a> Journal of Biomedical Optics. 15, (2010).</li><li>Zhang, D., Neumann, O., Wang, H., Yuwono, V. M., Barhoumi, A., Perham, M., Hartgerink, J. D., Wittung-Stafshede, P., Halas, N. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+Nanoparticles+Can+Induce+the+Formation+of+Protein-based+Aggregates+at+Physiological+pH.">Gold Nanoparticles Can Induce the Formation of Protein-based Aggregates at Physiological pH.</a> Nano Lett. 9, 666-671 (2009).</li><li>Alkilany, A. M., Nagaria, P. K., Hexel, C. R., Shaw, T. J., Murphy, C. J., Wyatt, M. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cellular+uptake+and+cytotoxicity+of+gold+nanorods:+molecular+origin+of+cytotoxicity+and+surface+effects.">Cellular uptake and cytotoxicity of gold nanorods: molecular origin of cytotoxicity and surface effects.</a> Small. 5, 701-708 (2009).</li><li>Sun, L., Liu, D., Wang, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Functional+gold+nanoparticle-peptide+complexes+as+cell-targeting+agents.">Functional gold nanoparticle-peptide complexes as cell-targeting agents.</a> Langmuir. 24, 10293-10297 (2008).</li><li>Park, J., Estrada, A., Sharp, K., Sang, K., Schwartz, J. A., Smith, D. K., Coleman, C., Payne, J. D., Korgel, B. A., Dunn, A. K., Tunnell, J. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Two-photon-induced+photoluminescence+imaging+of+tumors+using+near-infrared+excited+gold+nanoshells.">Two-photon-induced photoluminescence imaging of tumors using near-infrared excited gold nanoshells.</a> Opt. Express. 16, 1590-1599 (2008).</li><li>Nikoobakht, B., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preparation+and+growth+mechanism+of+gold+nanorods+(NRs)+using+seed-mediated+growth+method.">Preparation and growth mechanism of gold nanorods (NRs) using seed-mediated growth method.</a> Chemistry of Materials. 15, 1957-1962 (2003).</li><li>Hao, F., Nehl, C. L., Hafner, J. H., Nordlander, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Plasmon+resonances+of+a+gold+nanostar.">Plasmon resonances of a gold nanostar.</a> Nano Letters. 7, 729-732 (2007).</li><li>Hao, F., Nordlander, P., Sonnefraud, Y., Dorpe, P. V. a. n., Maier, S. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tunability+of+Subradiant+Dipolar+and+Fano-Type+Plasmon+Resonances+in+Metallic+Ring/Disk+Cavities:+Implications+for+Nanoscale+Optical+Sensing.">Tunability of Subradiant Dipolar and Fano-Type Plasmon Resonances in Metallic Ring/Disk Cavities: Implications for Nanoscale Optical Sensing.</a> ACS Nano. 3, 643-652 (2009).</li><li>Sweeney, C. M., Hasan, W., Nehl, C. L., Odom, T. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optical+Properties+of+Anisotropic+Core-Shell+Pyramidal+Particles.">Optical Properties of Anisotropic Core-Shell Pyramidal Particles.</a> Journal of Physical Chemistry A. 113, 4265-4268 (2009).</li><li>Dickerson, E. B., Dreaden, E. C., Huang, X. H., El-Sayed, I. H., Chu, H. H., Pushpanketh, S., McDonald, J. F., El-Sayed, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gold+nanorod+assisted+near-infrared+plasmonic+photothermal+therapy+(PPTT)+of+squamous+cell+carcinoma+in+mice.">Gold nanorod assisted near-infrared plasmonic photothermal therapy (PPTT) of squamous cell carcinoma in mice.</a> Cancer Letters. 269, 57-66 (2008).</li><li>Jana, N. R., Gearheart, L., Murphy, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Wet+chemical+synthesis+of+high+aspect+ratio+cylindrical+gold+nanorods.">Wet chemical synthesis of high aspect ratio cylindrical gold nanorods.</a> Journal of Physical Chemistry B. 105, 4065-4067 (2001).</li><li>Jana, N. R., Gearheart, L., Murphy, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Seed-mediated+growth+approach+for+shape-controlled+synthesis+of+spheroidal+and+rod-like+gold+nanoparticles+using+a+surfactant+template.">Seed-mediated growth approach for shape-controlled synthesis of spheroidal and rod-like gold nanoparticles using a surfactant template.</a> Advanced Materials. 13, 1389-1393 (2001).</li><li>Xiao, J., Qi, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surfactant-assisted,+shape-controlled+synthesis+of+gold+nanocrystals.">Surfactant-assisted, shape-controlled synthesis of gold nanocrystals.</a> Nanoscale. 3, 1383-1396 (2011).</li><li>Tao, A. R., Habas, S., Yang, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Shape+control+of+colloidal+metal+nanocrystals.">Shape control of colloidal metal nanocrystals.</a> Small. 4, 310-325 (2008).</li><li>Cole, J. R., Mirin, N. A., Knight, M. W., Goodrich, G. P., Halas, N. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Photothermal+Efficiencies+of+Nanoshells+and+Nanorods+for+Clinical+Therapeutic+Applications.">Photothermal Efficiencies of Nanoshells and Nanorods for Clinical Therapeutic Applications.</a> Journal of Physical Chemistry C. 113, 12090-12094 (2009).</li><li>Choi, J. S., Park, J. C., Nah, H., Woo, S., Oh, J., Kim, K. M., Cheon, G. J., Chang, Y., Yoo, J., Cheon, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+hybrid+nanoparticle+probe+for+dual-modality+positron+emission+tomography+and+magnetic+resonance+imaging.">A hybrid nanoparticle probe for dual-modality positron emission tomography and magnetic resonance imaging.</a> Angew. Chem. Int. Ed. Engl. 47, 6259-6262 (2008).</li><li>Chithrani, B. D., Ghazani, A. A., Chan, W. C. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Determining+the+Size+and+Shape+Dependence+of+Gold+Nanoparticle+Uptake+into+Mammalian+Cells.">Determining the Size and Shape Dependence of Gold Nanoparticle Uptake into Mammalian Cells.</a> Nano Letters. 6, 662-668 (2006).</li></ol>

Neste trabalho apresentamos um método para sintetizar nanostars ouro utilizando sementes de prata. Descobrimos que as sementes de prata resultou em um rendimento de 70% da produção nanostars. O nanostars ter um pico de absorção do infravermelho próximo, o que corresponde à sua superfície modo de ressonância plasmon, centrado entre 800 nm e 850 nm 7, 23. Estas propriedades propriedades permitem nanostars nosso ouro para ser de uso para aplicações biomédicas 24-26, tais como foto-térmica...

<table border="1"><tbody><tr><td> Nome do reagente </td><td> Companhia </td><td> Número de catálogo </td><td> Pureza </td></tr><tr><td> Citrato de sódio desidratar tribásico </td><td> Sigma </td><td> S4641 </td><td> 99,0% </td></tr><tr><td> Nitrato de prata </td><td> Aldrich </td><td> 204390 </td><td> 99,9999% </td></tr><tr><td> Borohidreto de sódio </td><td> Aldrich </td><td> 213462 </td><td> 99% </td></tr><tr><td> L-ácido ascórbico </td><td> Sigma-Aldrich </td><td> 255564 </td><td> 99% + </td></tr><tr><td> Trihidrato de cloreto de ouro </td><td> Aldrich </td><td> 520918 </td><td> 99,9% + </td></tr><tr><td> Brometo de hexadeciltrimetilamônio (CTAB) </td><td> Sigma </td><td> H6269 </td><td></td></tr></tbody></table><table border="1"><tbody><tr><td> Nome de equipamentos </td><td> Companhia </strong&gt; </td><td> Comentários </td></tr><tr><td> JEOL 2010-F </td><td> JEOL </td><td> Microscopia eletrônica de transmissão </td></tr><tr><td> Hitachi S-5500 </td><td> Hitachi </td><td> Usado em modo de digitalização microscópio eletrônico </td></tr><tr><td> Olis Cary-14 espectrofotômetro </td><td> Olis </td><td> Espectrofotômetro </td></tr></tbody></table>

gold nanostar synthesis with a silver seed mediated growth method

As propriedades físicas, químicas e óticas de nano-escala colóides dependem de seu tamanho, material, composição e forma 1-5. Há um grande interesse no uso de nano-colóides para a foto-ablação térmica, distribuição de medicamentos e muitas outras aplicações biomédicas 6. O ouro é usado particularmente por causa de sua baixa toxicidade 7-9. Uma propriedade de metal nano-colóides é que eles podem ter uma superfície de forte ressonância de plasma de 10. O pico da superfície modo de ressonância de plasma depende da estrutura e composição do metal nano-colóides. Desde que o plasma de superfície modo de ressonância é estimulado com a luz que há uma necessidade de ter a absorção de pico no infravermelho próximo, onde transmissividade tecido biológico é máxima 11, 12. Nós apresentamos um método para sintetizar ouro coloidal em forma de estrela, também conhecido como nanopartículas em forma de estrela ou 13-15 nanostars 16. Este método baseia-se comoOLUÇÃO contendo sementes de prata que são usadas como agente de nucleação para o crescimento anisotrópico de colóides de ouro 17-22. Microscopia eletrônica de varredura de análise (SEM) da resultante de ouro coloidal mostrou que 70% das nanoestruturas foram nanostars. Os outros 30% das partículas foram aglomerados amorfa de decahedra e rombóides. O pico de absorção da nanostars foi detectada a ser no infravermelho próximo (840 nm). Assim, o nosso método produz nanostars ouro adequado para aplicações biomédicas, especialmente para a foto-ablação térmica.

Watch this Scientific Journal Video about Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method at JoVE.com

Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method

Sintetizamos nanostars em forma de estrela de ouro usando um método de crescimento de sementes de prata mediada. O diâmetro do nanostars varia de 200 a 300 nm eo número de dicas variam de 7 a 10. As nanopartículas têm uma ampla ressonância de plasmons de superfície de modo centrado no infravermelho próximo.

Síntese Nanostar ouro com um método de crescimento de sementes de Prata Mediated

The physical, chemical and optical properties of nano-scale colloids depend on their material composition, size and shape 1-5. There is a great interest ...

Research

JoVE Journal

Bioengineering

Axon Stretch Growth: The Mechanotransduction of Neuronal Growth

Axon Crescimento Stretch: O Mecanotransdução do Crescimento Neuronal

During pre-synaptic embryonic development, neuronal processes traverse short distances to reach their targets via growth cone. Over time, neuronal somata ...

Bioengenharia

Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry

Síntese, Assembléia e Caracterização de monocamada Protected Films nanopartículas de ouro para Eletroquímica monocamada Protein

Colloidal gold nanoparticles protected with alkanethiolate ligands called monolayer protected gold clusters (MPCs) are synthesized and subsequently ...

Observing and Quantifying Fibroblast-mediated Fibrin Gel Compaction

Observando e quantificando compactação de gel de fibrina mediada por fibroblasto

Cells embedded in collagen and fibrin gels attach and exert traction forces on the fibers of the gel. These forces can lead to local and global ...

Synthesis of an Intein-mediated Artificial Protein Hydrogel

Síntese de uma proteína artificial intein mediada Hidrogel

We present the synthesis of a highly stable protein hydrogel mediated by a split-intein-catalyzed protein trans-splicing reaction. The building blocks of ...

Formation of Biomembrane Microarrays with a Squeegee-based Assembly Method

Formação de biomembrana Microarrays com um método de montagem baseada em Rodo

Lipid bilayer membranes form the plasma membranes of cells and define the boundaries of subcellular organelles. In nature, these membranes are ...

Synthesis of Keratin-based Nanofiber for Biomedical Engineering

Síntese de nanofibras baseado em queratina de Engenharia Biomédica

Electrospinning, due to its versatility and potential for applications in various fields, is being frequently used to fabricate nanofibers. Production of ...

Synthesis of Gold Nanoparticle Integrated Photo-responsive Liposomes and Measurement of Their Microbubble Cavitation upon Pulse Laser Excitation

Síntese de nanopartículas de ouro lipossomas Integrated Photo-reactivos e medição das suas microbolhas cavitação em cima do pulso laser de excitação

Photo-responsive nanoparticles (NPs) have received considerable attention because of their potential in providing spatial, temporal, and dosage control ...

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Síntese de hidrogeles com propriedades anti-deposição como membranas de purificação de água

Hydrogels have been widely utilized to enhance the surface hydrophilicity of membranes for water purification, increasing the antifouling properties and ...

Synthesis of Functionalized 10-nm Polymer-coated Gold Particles for Endothelium Targeting and Drug Delivery

Síntese de funcionalizados 10 nm polímero-revestida com partículas de ouro para o direcionamento do endotélio e entrega da droga

Gold nanoparticles (AuNPs) have been used extensively in medical research due to their size, biocompatibility, and modifiable surface. Specific targeting ...

Synthesis of Multi-walled Carbon Nanotubes Modified with Silver Nanoparticles and Evaluation of Their Antibacterial Activities and Cytotoxic Properties

Síntese de nanotubos de carbono de paredes Multi modificados com nanopartículas de prata e avaliação das suas actividades antibacterianas e propriedades citotóxicas

In this study, multi-walled carbon nanotubes (MWCNTs) were treated with an aqueous sulfuric acid solution to form an oxygen-based functional group. Silver ...