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

Questa ricerca è stata sostenuta dalla Fondazione Nazionale della Scienza Partnership per la Ricerca e Formazione in Materiali (PREM) Sovvenzione n. DMR-0934218. E &#39;stato sostenuto anche da numero Premio 2G12RR013646-11 dal Centro Risorse Nazionale per la ricerca. Il contenuto è di esclusiva responsabilità degli autori e non necessariamente rappresentano le opinioni ufficiali del Centro nazionale per le risorse di ricerca o il National Institutes of Health.

1. Argento seme preparazione <ol><li> Preparare una soluzione madre di nitrato d&#39;argento (AgNO 3) assumendo una massa arbitraria e mescolandolo con 10 ml di acqua deionizzata (DI). Calcolare molarità della soluzione. Conservare la soluzione in un luogo buio per isolare dalla luce. </li><li> Aggiungi 14,7 mg di citrato tribasico di sodio (Na 3 C 6 H 5 O 7) a 10 ml di acqua deionizzata per ottenere una soluzione 5 mM. Agitare il flacone fino a quando la polvere...

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In questo lavoro abbiamo presentato un metodo per sintetizzare nanostars oro con semi d&#39;argento. Abbiamo scoperto che i semi d&#39;argento portato a un rendimento del 70% la produzione di nanostars. Il nanostars hanno un picco di assorbimento infrarosso vicino, corrispondente al loro modo di risonanza plasmonica di superficie, centrato tra 800 nm e 850 nm 7, 23. Queste proprietà consentono ai nostri proprietà nanostars oro per essere utile per applicazioni biomediche 24-26, come foto-ablazion...

<table border="1"><tbody><tr><td> Nome del reagente </td><td> Azienda </td><td> Numero di catalogo </td><td> Purezza </td></tr><tr><td> Disidratano sodio citrato tribasico </td><td> Sigma </td><td> S4641 </td><td> 99,0% </td></tr><tr><td> Nitrato d&#39;argento </td><td> Aldrich </td><td> 204390 </td><td> 99,9999% </td></tr><tr><td> Sodio boroidruro </td><td> Aldrich </td><td> 213462 </td><td> 99% </td></tr><tr><td> Acido L-ascorbico </td><td> Sigma-Aldrich </td><td> 255564 </td><td> 99 +% </td></tr><tr><td> Cloruro di triidrato oro </td><td> Aldrich </td><td> 520918 </td><td> + 99,9% </td></tr><tr><td> Esadeciltrimetilammonio bromuro (CTAB) </td><td> Sigma </td><td> H6269 </td><td></td></tr></tbody></table><table border="1"><tbody><tr><td> Nome di attrezzature </td><td> Azienda </strong&gt; </td><td> Commenti </td></tr><tr><td> JEOL 2010-F </td><td> JEOL </td><td> Microscopio elettronico a trasmissione </td></tr><tr><td> Hitachi S-5500 </td><td> Hitachi </td><td> Utilizzato in modalità di scansione microscopio elettronico </td></tr><tr><td> Olis Cary-14 spettrofotometro </td><td> Olis </td><td> Spettrofotometro </td></tr></tbody></table>

gold nanostar synthesis with a silver seed mediated growth method

Le proprietà fisiche, chimiche ed ottiche di nano-scala colloidi dipende dalla loro composizione materiale, forma e dimensione 1-5. C&#39;è un grande interesse utilizzando nano-colloidi per foto-ablazione termica, la consegna della droga e molte altre applicazioni biomediche 6. L&#39;oro è utilizzato soprattutto a causa della sua bassa tossicità 7-9. Una proprietà di metallo nano-colloidi è che possono avere una superficie forte risonanza plasmonica 10. Il picco del modo di risonanza plasmonica di superficie dipende dalla struttura e la composizione del metallo nano-colloidi. Dal momento che la modalità di risonanza plasmonica di superficie è stimolata con la luce vi è la necessità di avere il picco di assorbimento nell&#39;infrarosso vicino a dove trasmissività tessuto biologico è massimo 11, 12. Vi presentiamo un metodo per sintetizzare la stella d&#39;oro a forma colloidale, conosciuta anche come nanoparticelle a forma di stella o 13-15 nanostars 16. Questo metodo si basa su comeOLUZIONE contenenti semi d&#39;argento che vengono utilizzati come agente di nucleazione per la crescita anisotropa di colloidi d&#39;oro 17-22. Microscopia elettronica a scansione (SEM), analisi di oro colloidale risultante ha mostrato che il 70% delle nanostrutture sono state nanostars. L&#39;altro 30% delle particelle erano ammassi amorfi di decahedra e rombi. Il picco di assorbanza del nanostars è stato rilevato di essere nel vicino infrarosso (840 nm). Così, il nostro metodo produce nanostars oro adatto per applicazioni biomediche, in particolare per la foto-ablazione termica.

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

Abbiamo sintetizzato nanostars oro a forma di stella d&#39;argento con un metodo semi mediata della crescita. Il diametro del nanostars varia da 200 a 300 nm e il numero di punte variano da 7 a 10. Le nanoparticelle hanno una vasta modalità di risonanza plasmonica di superficie centrato nel vicino infrarosso.

Sintesi Nanostar oro con un metodo d&#39;argento crescita Seed 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 ...

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