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

Denne forskning blev støttet af National Science Foundation i partnerskaber for forskning og uddannelse i Materialer (PREM) Grant Nej DMR-0934218. Det blev også støttet af Award Antal 2G12RR013646-11 fra National Center for Research Resources. Indholdet er alene forfatternes ansvar og ikke nødvendigvis repræsenterer den officielle synspunkter National Center for Research Resources, eller National Institutes of Health.

1. Silver frø forberedelse <ol><li> Forbered en stamopløsning af sølvnitrat (AGNO 3) ved at tage en tilfældig masse og blande det med 10 mL deioniseret (DI) vand. Beregn molariteten af ​​løsningen. Oploesningen opbevares i et mørkt sted at isolere mod lys. </li><li> Tilsæt 14,7 mg natrium citrat trebasisk (Na 3 C 6 H 5 O 7) til 10 ml af DI vand for at lave en 5 mM løsning. Ryst hætteglasset indtil pulveret er opløst. </li><li> Tilsæt 15,1 mg natrium...

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I dette arbejde har vi præsenteret en metode til at syntetisere guld nanostars med sølv frø. Vi fandt, at sølv frø resulterede i et afkast på 70% produktion af nanostars. De nanostars har en nær infrarød absorption peak, der svarer til deres overflade plasmon resonans-tilstand, centreret mellem 800 nm og 850 nm 7, 23. Disse egenskaber egenskaber tillader vores guld nanostars at være til nytte for biomedicinske anvendelser 24-26, såsom foto-termisk ablation. En...

<table border="1"><tbody><tr><td> Navn på reagenset </td><td> Firma </td><td> Katalog nummer </td><td> Renhed </td></tr><tr><td> Natriumcitrat trebasisk dehydrere </td><td> Sigma </td><td> S4641 </td><td> 99,0% </td></tr><tr><td> Sølvnitrat </td><td> Aldrich </td><td> 204390 </td><td> 99,9999% </td></tr><tr><td> Natrium borohydride </td><td> Aldrich </td><td> 213462 </td><td> 99% </td></tr><tr><td> L-Ascorbinsyre </td><td> Sigma-Aldrich </td><td> 255564 </td><td> 99 +% </td></tr><tr><td> Guld chlorid trihydrat </td><td> Aldrich </td><td> 520918 </td><td> 99,9 +% </td></tr><tr><td> Hexadecyltrimethylammonium bromid (CTAB) </td><td> Sigma </td><td> H6269 </td><td></td></tr></tbody></table><table border="1"><tbody><tr><td> Navn på udstyr </td><td> Firma </stRong&gt; </td><td> Kommentarer </td></tr><tr><td> JEOL 2010-F </td><td> JEOL </td><td> Transmissions elektron mikroskop </td></tr><tr><td> Hitachi S-5500 </td><td> Hitachi </td><td> Bruges i scanning elektron mikroskop-mode </td></tr><tr><td> Olis Cary-14 spektrofotometer </td><td> Olis </td><td> Spektrofotometer </td></tr></tbody></table>

gold nanostar synthesis with a silver seed mediated growth method

De fysiske, kemiske og optiske egenskaber af nano-skala kolloider er afhængige af deres materielle sammensætning, størrelse og form 1-5. Der er stor interesse for at bruge nano-kolloider til foto-termisk ablation, drug delivery og mange andre biomedicinske anvendelser 6. Guld er især brugt på grund af den lave giftighed 7-9. En egenskab af metal nano-kolloider er, at de kan have en stærk overflade plasmon resonans 10. Toppen af ​​overfladen plasmon resonans-tilstand afhænger af strukturen og sammensætningen af ​​metal nano-kolloider. Siden overfladen plasmon resonans-tilstand bliver stimuleret med lys der er behov for at have den højeste absorbans i det nærinfrarøde hvor biologisk væv transmissionsevne er maksimal 11, 12. Vi præsenterer en metode til at syntetisere stjerne formet kolloidt guld, også kendt som stjerne formede nanopartikler 13-15 eller nanostars 16. Denne metode er baseret på såolution indeholdende sølv frø, der bruges som kernedannende agent for anisotropisk vækst af guld kolloider 17-22. Scanning elektron mikroskopi (SEM) analyse af de resulterende guld kolloid viste, at 70% af nanostrukturer var nanostars. De andre 30% af partiklerne var amorfe klynger af decahedra og rhomboids. Absorbansen højdepunktet af nanostars blev konstateret at være i nær infrarød (840 nm). Således er vores metode producerer guld nanostars egnet til biomedicinske applikationer, bl.a. til foto-termisk 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

Vi syntetiseret stjerne formet guld nanostars bruge en sølv frø medieret vækst metode. Diameteren på nanostars spænder fra 200 til 300 nm, og antallet af tips varierer fra 7 til 10. Nanopartiklerne har en bred flade plasmon resonans-tilstand centreret i det nærinfrarøde.

Guld Nanostar Syntese med en Silver Seed medierede væksthæmning Metode

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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