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Langmuir
Volumn 24, Issue 3, 2008, Pages 644-649
The importance of the CTAB surfactant on the colloidal seed-mediated synthesis of gold nanorods
Author keywords

[No Author keywords available]
Indexed keywords

GOLD NANORODS; GOLD PARTICLES; SURFACTANT-ASSISTED APPROACH;
EID: 39449087255     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la703625a     Document Type: Article
Times cited : (388)
References (51)
  • 8
    • 39449132305 scopus 로고    scopus 로고
    • 10,11 therefore CTAB-coated gold nanorods may in fact not be useful for in vivo diagnostics and therapy.
    • 10,11 therefore CTAB-coated gold nanorods may in fact not be useful for in vivo diagnostics and therapy.
  • 26
    • 39449088031 scopus 로고    scopus 로고
    • Doubly-distilled deionized water was used in all preparations. Hydrogen tetrachloroaurate(III) hydrate, sodium borohydride, silver nitrate, and ascorbic acid were purchased from Sigma-Aldrich and used as received. Seed gold particles were formed by adding aqueous sodium borohydride (0.01 M, 600μL) to a mixed aqueous solution of CTAB (0.10 M, 9.75 mL) and hydrogen tetrachloroaurate-(III) hydrate (0.01 M, 250 μL, The solution is stirred for 2 min after adding the sodium borohydride solution. 12 μL of the gold seed solution was then added to a growth solution of CTAB (0.10 M, 9.50 mL, silver nitrate (0.01 M, 75 μL, hydrogen tetrachloroaurate (III) hydrate (0.01 M, 500 μL, and ascorbic acid 0.1 M, 55 μL, The nanorods were allowed to grow overnight without stirring at 24°C and their absorbance spectrum was measured the next day
    • Doubly-distilled deionized water was used in all preparations. Hydrogen tetrachloroaurate(III) hydrate, sodium borohydride, silver nitrate, and ascorbic acid were purchased from Sigma-Aldrich and used as received. Seed gold particles were formed by adding aqueous sodium borohydride (0.01 M, 600μL) to a mixed aqueous solution of CTAB (0.10 M, 9.75 mL) and hydrogen tetrachloroaurate-(III) hydrate (0.01 M, 250 μL). The solution is stirred for 2 min after adding the sodium borohydride solution. 12 μL of the gold seed solution was then added to a growth solution of CTAB (0.10 M, 9.50 mL), silver nitrate (0.01 M, 75 μL), hydrogen tetrachloroaurate (III) hydrate (0.01 M, 500 μL), and ascorbic acid (0.1 M, 55 μL). The nanorods were allowed to grow overnight without stirring at 24°C and their absorbance spectrum was measured the next day.
  • 27
    • 39449101331 scopus 로고    scopus 로고
    • We performed these tests after talking to Jason Hafner, who pointed out that in their lab they successfully use CTAB from Sigma to generate nanorods. As it turns out, Sigma sells several different kinds of CTAB. We were using product number H5882, and Jason Hafner's lab was using product number H9151. We had not yet tried the particular CTAB that they were using. Upon testing, we found that different high-purity CTABs from Sigma did in fact yield nanorods.
    • We performed these tests after talking to Jason Hafner, who pointed out that in their lab they successfully use CTAB from Sigma to generate nanorods. As it turns out, Sigma sells several different kinds of CTAB. We were using product number H5882, and Jason Hafner's lab was using product number H9151. We had not yet tried the particular CTAB that they were using. Upon testing, we found that different "high-purity" CTABs from Sigma did in fact yield nanorods.
  • 51
    • 0034594990 scopus 로고    scopus 로고
    • From Supporting Information for Peng, X, Manna, L, Yang, W, Wickham, J, Scher, E, Kadavanich, A, Alivisatos, A. P. Nature 2000, 404, 59-61: Pure TOPO is not a suitable surfactant for growing rod-like CdSe in a controllable manner. Growth in pure TOPO occurs so quickly at the high monomer concentrations desired for the growth of rods that the resulting rod-like particles are often insoluble and too big in all three dimensions. Technical grade TOPO contains additional components, which apparently act to slow the growth. Rather than rely on the fortuitous presence of impurities, addition of a molecule that coordinates more strongly than TOPO to cadmium can be used to adjust the growm rate, and hence the shape of the nanocrystals. The impurities present in technical grade TOPO which are most likely to bind relatively strongly to cadmium ions are alkyl phosphonic and phosphinic acids; therefore, hexyl-phosphonic acid HPA, C6OH 15PO
    • 3) was added to pure TOPO to 'simulate' the presence of those impurities."

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.