Quantitation of metal content in the silver-assisted growth of gold nanorods

被引:639
作者
Orendorff, CJ [1 ]
Murphy, CJ [1 ]
机构
[1] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA
关键词
D O I
10.1021/jp0570972
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The seed-mediated approach to making gold nanorods in aqueous surfactant solutions has become tremendously popular in recent years. Unlike the use of strong chemical reductants to make spherical gold nanoparticles, the growth of gold nanorods requires weak reducing conditions, leading to an unknown degree of gold reduction. The metal content of gold nanorods, made in high yield in the presence of silver ion, is determined by inductively coupled plasma atomic emission spectroscopy. Through the use of the known gold concentration in nanorods, molar extinction coefficients are calculated for nanorods of varying aspect ratios from 2.0 to 4.5. The extinction coefficients at the longitudinal plasmon band peak maxima for these nanorods vary from 2.5 x 10(9) to 5.5 x 10(9) M-1 cm(-1), respectively, on a per-particle basis. Many of the gold ions present in the growth solution remain unreacted; insights into the growth mechanism of gold nanorods are discussed.
引用
收藏
页码:3990 / 3994
页数:5
相关论文
共 40 条
  • [1] Preferential end-to-end assembly of gold nanorods by biotin-streptavidin connectors
    Caswell, KK
    Wilson, JN
    Bunz, UHF
    Murphy, CJ
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (46) : 13914 - 13915
  • [2] Oriented assembly of Au nanorods using biorecognition system
    Chang, JY
    Wu, HM
    Chen, H
    Ling, YC
    Tan, WH
    [J]. CHEMICAL COMMUNICATIONS, 2005, (08) : 1092 - 1094
  • [3] The shape transition of gold nanorods
    Chang, SS
    Shih, CW
    Chen, CD
    Lai, WC
    Wang, CRC
    [J]. LANGMUIR, 1999, 15 (03) : 701 - 709
  • [4] ELSAYED MA, 2001, ACCOUNTS CHEM RES, V13, P57
  • [5] CONTROLLED NUCLEATION FOR REGULATION OF PARTICLE-SIZE IN MONODISPERSE GOLD SUSPENSIONS
    FRENS, G
    [J]. NATURE-PHYSICAL SCIENCE, 1973, 241 (105): : 20 - 22
  • [6] Fine-tuning the shape of gold nanorods
    Gou, LF
    Murphy, CJ
    [J]. CHEMISTRY OF MATERIALS, 2005, 17 (14) : 3668 - 3672
  • [7] Jana NR, 2001, ADV MATER, V13, P1389, DOI 10.1002/1521-4095(200109)13:18<1389::AID-ADMA1389>3.0.CO
  • [8] 2-F
  • [9] Wet chemical synthesis of high aspect ratio cylindrical gold nanorods
    Jana, NR
    Gearheart, L
    Murphy, CJ
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (19): : 4065 - 4067
  • [10] Electrodynamics of noble metal nanoparticles and nanoparticle clusters
    Jensen, T
    Kelly, L
    Lazarides, A
    Schatz, GC
    [J]. JOURNAL OF CLUSTER SCIENCE, 1999, 10 (02) : 295 - 317