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

Diese Arbeit wurde von der National Science Foundation Partnerships für Forschung und Bildung in der Materialwirtschaft (PREM) Grant No DMR-0934218 gefördert. Es wurde auch von Preis Anzahl 2G12RR013646-11 von National Center for Research Resources unterstützt. Der Inhalt ist ausschließlich in der Verantwortung der Autoren und nicht unbedingt die offizielle Meinung des National Center for Research Resources oder die National Institutes of Health.

1. Silber Saataufbereitungsanlagen <ol><li> Bereiten Sie eine Stammlösung von Silbernitrat (AgNO 3), indem eine beliebige Masse und das Mischen mit 10 ml deionisiertem Wasser (DI). Berechnen Sie Molarität der Lösung. Halten Sie die Lösung in einem dunklen Ort, um sie vor Licht zu isolieren. </li><li> Zusatz von 14,7 mg Natriumcitrat tribasischen (Na 3 C 6 H 5 O 7) zu 10 mL VE-Wasser zu einer 5 mM Lösung zu machen. Schütteln Sie die Durchstechflasche, bis das...

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In dieser Arbeit haben wir eine Methode, um Gold nanostars mit Silber Samen synthetisieren vorgestellt. Wir fanden, dass Silber Samen in einer Ausbeute von 70% der Produktion von nanostars geführt. Die nanostars eine Nah-Infrarot-Absorptions-Peak, entsprechend ihrer Oberflächen-Plasmon-Resonanz-Modus, zwischen 800 nm und 850 nm 7, 23 zentriert. Diese Eigenschaften Eigenschaften ermöglichen es unseren Gold nanostars von Nutzen für biomedizinische Anwendungen 24-26, wie Foto-Thermoablation werden...

<table border="1"><tbody><tr><td> Name des Reagenzes </td><td> Firma </td><td> Katalog-Nummer </td><td> Reinheit </td></tr><tr><td> Natriumcitrat tribasischen dehydrieren </td><td> Sigma </td><td> S4641 </td><td> 99,0% </td></tr><tr><td> Silbernitrat </td><td> Aldrich </td><td> 204390 </td><td> 99,9999% </td></tr><tr><td> Natriumborhydrid </td><td> Aldrich </td><td> 213462 </td><td> 99% </td></tr><tr><td> L-Ascorbinsäure </td><td> Sigma-Aldrich </td><td> 255564 </td><td> 99 +% </td></tr><tr><td> Gold-chlorid-Trihydrat </td><td> Aldrich </td><td> 520918 </td><td> 99,9 +% </td></tr><tr><td> Hexadecyltrimethylammoniumbromid (CTAB) </td><td> Sigma </td><td> H6269 </td><td></td></tr></tbody></table><table border="1"><tbody><tr><td> Name der Ausrüstung </td><td> Firma </strong&gt; </td><td> Kommentare </td></tr><tr><td> JEOL 2010-F </td><td> JEOL </td><td> Transmissions-Elektronenmikroskop </td></tr><tr><td> Hitachi S-5500 </td><td> Hitachi </td><td> Gebrauchte in Rasterelektronenmikroskop-Modus </td></tr><tr><td> Olis Cary-14 Spektrophotometer </td><td> Olis </td><td> Spektrophotometer </td></tr></tbody></table>

gold nanostar synthesis with a silver seed mediated growth method

Die physikalischen, chemischen und optischen Eigenschaften von Nano-Kolloide sind abhängig von ihrer stofflichen Zusammensetzung, Größe und Form 1-5. Es gibt ein großes Interesse im Umgang mit Nano-Kolloide für photo-thermische Ablation, Drug Delivery und viele andere biomedizinische Anwendungen 6. Gold ist vor allem wegen ihrer geringen Toxizität 7-9 verwendet. Eine Eigenschaft der Metall-Nano-Kolloide ist, dass sie eine starke Oberflächen-Plasmon-Resonanz-10 haben. Der Höhepunkt der Oberflächen-Plasmon-Resonanz-Modus hängt von der Struktur und Zusammensetzung des Metalls Nano-Kolloide. Da die Oberflächen-Plasmon-Resonanz-Modus mit Licht angeregt wird, gibt es einen Bedarf an der Spitze Absorption im nahen Infrarotbereich, wo biologisches Gewebe Transmissivität ist maximal 11, 12 haben. Wir präsentieren eine Methode zur sternförmigen kolloidalem Gold, auch als sternförmige Nanopartikel 13-15 oder nanostars 16 bekannt zu synthetisieren. Diese Methode beruht auf als Basislösung mit Silber Samen, die als Nukleierungsmittel für anisotropes Wachstum von Gold-Kolloide 17-22 verwendet werden. Rasterelektronenmikroskopie (SEM)-Analyse der resultierenden Goldkolloid zeigte, dass 70% der Nanostrukturen nanostars wurden. Die anderen 30% der Partikel wurden amorphe Cluster Dekaedern und Rauten. Die Absorption Höhepunkt der nanostars erkannt wurde, um im nahen Infrarot (840 nm) werden. So produziert unser Verfahren gold nanostars für biomedizinische Anwendungen geeignet, besonders für Foto-thermischen Ablation.

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

Wir synthetisierten sternförmigen Gold nanostars mit einem silbernen Saat vermitteltes Wachstum Methode. Der Durchmesser der nanostars reicht von 200 bis 300 nm und die Anzahl der Spitzen variieren von 7 bis 10. Die Nanopartikel haben eine große Oberflächen-Plasmon-Resonanz-Modus im nahen Infrarot zentriert.

Gold Nanostar Synthesis mit einem Silver Seed vermitteltes Wachstum Methode

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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