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

Dit onderzoek werd gesteund door de National Science Foundation partnerschappen voor onderzoek en onderwijs in Materials (PREM) Grant No DMR-0934218. Het werd ook ondersteund door de Award Number 2G12RR013646-11 van het National Center for Research Resources. De inhoud is uitsluitend de verantwoordelijkheid van de auteurs en niet noodzakelijkerwijs het officiële standpunt van het Nationale Centrum voor Onderzoek Resources of de National Institutes of Health.

1. Zilver zaad voorbereiding <ol><li> Bereid een voorraad oplossing van zilvernitraat (AgNO 3) door het nemen van een willekeurige massa en te mengen met 10 ml gedeïoniseerd (DI) water. Bereken molariteit van de oplossing. Bewaar de oplossing in een donkere plaats om het te isoleren van het licht. </li><li> Voeg 14,7 mg natriumcitraat tribasisch (Na 3 C 6 H 5 O 7) tot 10 ml van DI water tot een 5 mM oplossing te maken. Schud de flacon tot het poeder is opgelost. ...

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In dit werk hebben we presenteerde een methode om goud nanostars met zilver zaden te synthetiseren. We vonden dat zilver zaden resulteerde in een opbrengst van 70% productie van nanostars. De nanostars hebben een nabij infrarood absorptie piek, wat overeenkomt met het oppervlak plasmonresonantie mode, gecentreerd tussen 800 nm en 850 nm 7, 23. Deze eigenschappen eigenschappen maken het mogelijk onze goud nanostars te zijn voor het gebruik van biomedische toepassingen 24-26, zoals foto-thermische ab...

<table border="1"><tbody><tr><td> Naam van het reagens </td><td> Vennootschap </td><td> Catalogus nummer </td><td> Zuiverheid </td></tr><tr><td> Natriumcitraat tribasisch ontwateren </td><td> Sigma </td><td> S4641 </td><td> 99,0% </td></tr><tr><td> Zilvernitraat </td><td> Aldrich </td><td> 204390 </td><td> 99,9999% </td></tr><tr><td> Natriumboorhydride </td><td> Aldrich </td><td> 213462 </td><td> 99% </td></tr><tr><td> L-Ascorbinezuur </td><td> Sigma-Aldrich </td><td> 255564 </td><td> 99 +% </td></tr><tr><td> Goudchloride trihydraat </td><td> Aldrich </td><td> 520918 </td><td> 99,9% + </td></tr><tr><td> Hexadecyltrimethylammonium bromide (CTAB) </td><td> Sigma </td><td> H6269 </td><td></td></tr></tbody></table><table border="1"><tbody><tr><td> Naam van de apparatuur </td><td> Vennootschap </stRong&gt; </td><td> Reacties </td></tr><tr><td> JEOL 2010-F </td><td> JEOL </td><td> Transmissie-elektronenmicroscoop </td></tr><tr><td> Hitachi S-5500 </td><td> Hitachi </td><td> Gebruikt in scanning electron microscoop modus </td></tr><tr><td> Olis Cary-14 spectrofotometer </td><td> Olis </td><td> Spectrofotometer </td></tr></tbody></table>

gold nanostar synthesis with a silver seed mediated growth method

De fysische, chemische en optische eigenschappen van nano-schaal colloïden afhankelijk van hun samenstelling, grootte en vorm 1-5. Er is een grote interesse in het gebruik van nano-colloïden voor foto-thermische ablatie, drug delivery en vele andere biomedische toepassingen 6. Goud wordt vooral gebruikt vanwege de lage toxiciteit 7-9. Een eigenschap van metalen nano-colloïden is dat ze een sterke surface plasmon resonance 10. De piek van de oppervlakte plasmon resonance-modus is afhankelijk van de structuur en samenstelling van het metaal nano-colloïden. Omdat het oppervlak plasmon resonance-modus wordt gestimuleerd met licht is er behoefte om de piek absorptie hebben in het nabije infrarood, waar biologisch weefsel doorlaatvermogen is maximaal 11, 12. Wij presenteren een methode om de stervormige colloïdaal goud, ook wel bekend als stervormige nanodeeltjes 13-15 of nanostars 16 te synthetiseren. Deze methode is gebaseerd op delutie die zilver zaden die worden gebruikt als de kiemvormer voor anisotrope groei van goud colloïden 17-22. Scanning elektronenmicroscopie (SEM) analyse van de resulterende goud colloïde toonde aan dat 70% van de nanostructuren waren nanostars. De overige 30% van de deeltjes werden amorfe clusters van decahedra en rhomboidei. De absorptie piek van de nanostars werd gedetecteerd worden in het nabije infrarood (840 nm). Zo, onze methode levert goud nanostars geschikt voor biomedische toepassingen, met name voor foto-thermische ablatie.

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

We gesynthetiseerd stervormige gouden nanostars met behulp van een zilveren zaad gemedieerde groei methode. De diameter van de nanostars varieert van 200 tot 300 nm en het aantal tips variëren van 7 tot 10. De nanodeeltjes hebben een brede oppervlakte plasmon resonance-modus in het midden van het nabij-infrarood.

Goud Nanostar Synthese met een Silver Zaad gemedieerde groei 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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