Name: simultaneous synthesis of single-walled carbon nanotubes and graphene in a magnetically-enhanced arc plasma
Uploaded: 2012-02-02T12:00:00
Description: Watch this Scientific Journal Video about Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma at JoVE.com

Dette arbejde blev støttet af NSF / DOE partnerskab i plasma Videnskab og Teknologi (NSF Grant No CBET-0853777 og DOE Grant No DE-SC0001169), STTR Fase I-projektet (NSF STTR FASE I No.1010133). Forfatterne vil gerne takke PPPL Offsite forskningsprogram støttet af Office of Fusion Energy Sciences for at støtte bue eksperimenter.

1. Anode forberedelse <ol><li> Scale nikkel pulver (99,8%, 300 mesh) og yttrium pulver (99,9%, 40 mesh) i henhold til den molære radioen i 4.2:1 som katalysator pulver. </li><li> Bland Katalysatorpulver med grafit pulver (99,9995%, 200 mesh) meget godt. Fyld den blandede pulveret i hule grafit stang (5 mm ydre diameter, 2,5 mm indvendig diameter og 75 mm længde) fast. Sørg for, at den totale molære radioen i C: Ni: Y i anode stang er 94.8:4.2:1, som er optimale forhold til at syntetisere SWCNT 9. </li><...

<ol>
	<li>Dai, H. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrical+transport+properties+and+field+effect+transistors+of+carbon+nanotubes.">Electrical transport properties and field effect transistors of carbon nanotubes.</a> Nano. 1, 1-13 (2006).</li><li>Lai, K. W. C., Xi, N., Fung, C. K. M., Chen, H. Z., Tarn, T. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Engineering+the+band+gap+of+carbon+nanotube+for+infrared+sensors.">Engineering the band gap of carbon nanotube for infrared sensors.</a> Applied Physics Letters. 95, 221107-221107 (2009).</li><li>Gabor, N. M., Zhong, Z. H., Bosnick, K., Park, J., McEuen, P. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Extremely+Efficient+Multiple+Electron-Hole+Pair+Generation+in+Carbon+Nanotube+Photodiodes.">Extremely Efficient Multiple Electron-Hole Pair Generation in Carbon Nanotube Photodiodes.</a> Science. 325, 1367-1371 (2009).</li><li>Liu, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hydrogen+storage+in+single-walled+carbon+nanotubes+at+room+temperature.">Hydrogen storage in single-walled carbon nanotubes at room temperature.</a> Science. 286, 1127-1129 (1999).</li><li>Keidar, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Magnetic-field-enhanced+synthesis+of+single-wall+carbon+nanotubes+in+arc+discharge.">Magnetic-field-enhanced synthesis of single-wall carbon nanotubes in arc discharge.</a> Journal of Applied Physics. 103, 094318-094318 (2008).</li><li>Li, J., Volotskova, O., Shashurin, A., Keidar, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Controlling+Diameter+Distribution+of+Catalyst+Nanoparticles+in+Arc+Discharge.">Controlling Diameter Distribution of Catalyst Nanoparticles in Arc Discharge.</a> Journal of Nanoscience and Nanotechnology. 11, 10047-10052 (2011).</li><li>Volotskova, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tailored+Distribution+of+Single-Wall+Carbon+Nanotubes+from+Arc+Plasma+Synthesis+Using+Magnetic+Fields.">Tailored Distribution of Single-Wall Carbon Nanotubes from Arc Plasma Synthesis Using Magnetic Fields.</a> Acs. Nano. 4, 5187-5192 (2010).</li><li>Volotskova, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Single-step+synthesis+and+magnetic+separation+of+graphene+and+carbon+nanotubes+in+arc+discharge+plasmas.">Single-step synthesis and magnetic separation of graphene and carbon nanotubes in arc discharge plasmas.</a> Nanoscale. 2, 2281-2285 (2010).</li><li>Farhat, S., Scott, C. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Review+of+the+arc+process+modeling+for+fullerene+and+nanotube+production.">Review of the arc process modeling for fullerene and nanotube production.</a> Journal of Nanoscience and Nanotechnology. 6, 1189-1210 (2006).</li><li>Keidar, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Increasing+the+length+of+single-wall+carbon+nanotubes+in+a+magnetically+enhanced+arc+discharge.">Increasing the length of single-wall carbon nanotubes in a magnetically enhanced arc discharge.</a> Applied Physics Letters. 92, 043129-043129 (2008).</li><li>Ferrari, A. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Raman+spectrum+of+graphene+and+graphene+layers.">Raman spectrum of graphene and graphene layers.</a> Physical Review Letters. 97, 187401-187401 (2006).</li></ol>

I videoen snapshots vist i figur 1b og 1d, for det tilfælde, at interelectrode kløften blev placeret i en afstand af ca h = 75 mm fra bunden af permanent magnet, skal det bemærkes, at ændring af magnet stilling (vi testede magnet skift langs z-aksen og dreje magnet over) resulterer i afvigelse af bue jet flow i x-retning svarende til retning af J × B kraft illustreret i figur 1c. Det blev også bemærket, at geometri Arc plasma kolonne ikke ændrede ved at fjerne n...

Tabel over specifikke reagenser og udstyr: <table border="1"><tbody><tr><th> Navn på reagenset </th><th> Firma </th><th> Katalog nummer </th><th> Kommentarer (valgfri) </th></tr><tr><td> Methanol </td><td> ACROS Organics </td><td> 423950010 </td><td></td></tr><tr><td> Nikkelpulver </td><td> Alfa Aesar </td><td> 10581 </td><td></td></tr><tr><td> Yttrium pulver </td><td> ACROS Organics </td><td> 318060050 </td><td></td></tr><tr><td> Grafit pulver </td><td> Alfa Aesar </td><td> 40799 </td><td></td></tr><tr><td> Hollow grafit stang </td><td> Saturn Industries </td><td> POCO EDM 3 </td><td></td></tr><tr><td> Permanent magnet </td><td> McMaster-Carr </td><td> 57315K51 </td><td></td></tr><tr><td> Molybdæn ark </td><td> Dingqi Sci. og Tech. </td><td> 080504-11 </td><td></td&gt; </tr><tr><td> Ultrasonic dismembrator </td><td> Fisher Scientific </td><td> Model 150T </td><td></td></tr><tr><td> Hall-effekt Gaussmeter </td><td> AI </td><td> Model 100 </td><td></td></tr><tr><td> Svejsning strømforsyning </td><td> Miller Electric </td><td> Gold Star 600SS </td><td></td></tr><tr><td> Vakuumpumpe </td><td> J / B </td><td> DV-85N </td><td></td></tr><tr><td> SEM </td><td> Zeiss </td><td> LEO 1430VP </td><td></td></tr><tr><td> TEM </td><td> JEOL </td><td> 1200 EX </td><td></td></tr><tr><td> Raman </td><td> HORIBA </td><td> HR800 </td><td></td></tr></tbody></table>

simultaneous synthesis of single-walled carbon nanotubes and graphene in a magnetically-enhanced arc plasma

Carbon nanostrukturer som single-walled carbon nanorør (SWCNT) og graphene tiltrække en syndflod af interesse for lærde i dag på grund af deres meget lovende ansøgning om molekylære sensorer, felt effekt transistoren og super tynd og fleksibel elektronisk udstyr 1-4. Anodisk bue udledning støttet af erosion af anodemateriale er en af ​​de mest praktiske og effektive metoder, der kan give specifikke ikke-ligevægt processer og en stor tilstrømning af kulstof materiale til at udvikle strukturer på relativt højere temperatur, og dermed as- syntetiserede produkter har nogle strukturelle mangler og bedre krystallinitet. For yderligere at forbedre styrbarhed og fleksibilitet i syntese af kulstof nanostrukturer i Arc udledning, kan magnetfelter anvendes under syntesen udvælgelsesprocessen efter de stærke magnetiske reaktioner bue plasmaer. Det blev påvist, at magnetisk med forbedret arc DischARGE kan øge den gennemsnitlige varighed af SWCNT 5, smalle diameteren fordelingen af metallisk katalysator partikler og kulstof nanorør 6, og ændre forholdet mellem metalliske og halvledende kulstof-nanorør 7, samt føre til graphene syntese 8. Desuden er det værd at bemærke, at når vi indfører et ikke-ensartet magnetfelt med den komponent vinkelret på strøm i bue, kan Lorentz kraft langs J × B retning generere plasma jet og gøre effektiv levering af kulstof ion partikler og varmeflux til prøver. Som følge heraf blev store graphene flager og høj renhed single-walled carbon nanorør samtidigt genereres af sådanne nye magnetisk forbedret anodisk bue metode. Arc billedbehandling, scanning elektron mikroskop (SEM), blev transmissions elektron mikroskop (TEM) og Raman spektroskopi ansat til at analysere karakterisering af kulstof nanostrukturer. Disse resultater tyder på enbredt spektrum af muligheder for at manipulere med de egenskaber af nanostrukturer fremstilles i plasmaer, ved at kontrollere den bue betingelser.

Watch this Scientific Journal Video about Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma at JoVE.com

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

Anodisk bue decharge er en af ​​de mest praktiske og effektive metoder til at syntetisere forskellige kulstof nanostrukturer. At øge bue styrbarhed og fleksibilitet, var en ikke-ensartet magnetfelt indført til at behandle et-trins syntese af store graphene flager og høj renhed single-walled carbon nanorør.

Samtidig Syntese af Single-walled carbon nanorør og Graphene i en magnetisk-forstærket Arc Plasma

Carbon nanostructures such as single-walled carbon nanotubes (SWCNT) and graphene attract a deluge of interest of scholars nowadays due to their very ...

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