| 학회 | 한국재료학회 |
| 학술대회 | 2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 | 19권 2호 |
| 발표분야 | B. 나노 재료(Nano Materials) |
| 제목 | Effect of Sodium Chloride and Silver Nitrate salts on Formation of Gold Nanorods |
| 초록 | ABSTRACT: Gold nanorods(AuNRs) are attracting materials, since their longitudinal localized surface plasmon resonance can be easily tuned by changing aspect ratio, so that they have various application fields such as surface-enhanced Raman scattering (SERS), fluorescence and photothermal therapy.[1-3] The AuNRs were prepared by seed-mediated growth method,[4] using two different hexadecyltrimethylammonium bromide (CTAB) sources: CTAB H5882 (Sigma Aldrich) and CTAB H6269. As reported by Danielle and coworkers, CTAB H5882 is not effective in AuNRs formation.[5] However, addition of sodium chloride salt made huge difference. The addition with low concentration brought about a rise of longitudinal localized surface plasmon resonance peak. Higher concentration of the salt made red-shift, which indicates that aspect ratio of the AuNRs increased. The result of AuNRs synthesis with changing silver nitrate salt concentration shows that AuNRs portion is influenced by the silver nitrate concentration. There is an optimum concentration of the silver nitrate to maximize the AuNRs portion. Excess silver nitrate ends up with low content of AuNRs. In conclusion, chloride ions have an effect on the aspect ratio of AuNRs. They help the formation of high aspect-ratio AuNRs. The content of AuNRs can be maximized by controlling the concentration of silver nitrate. References: [1] Nikoobakht, B., J.P. Wang, and M.A. El-Sayed, Surface-enhanced Raman scattering of molecules adsorbed on gold nanorods: off-surface plasmon resonance condition. Chemical Physics Letters, 2002. 366(1-2): p. 17-23. [2] Mohamed, M.B., et al., The 'lightning' gold nanorods: fluorescence enhancement of over a million compared to the gold metal. Chemical Physics Letters, 2000. 317(6): p. 517-523. [3] Jin, S.B., et al., Surface chemistry-mediated penetration and gold nanorod thermotherapy in multicellular tumor spheroids. Nanoscale, 2013. 5(1): p. 143-146. [4] Sau, T.K. and C.J. Murphy, Seeded high yield synthesis of short Au nanorods in aqueous solution. Langmuir, 2004. 20(15): p. 6414-6420. [5] Smith, D.K., N.R. Miller, and B.A. Korgel, Iodide in CTAB Prevents Gold Nanorod Formation. Langmuir, 2009. 25(16): p. 9518-9524. |
| 저자 | Jin Ock Park1, Dae-Yong Jeong2, Sohye Cho1, Seung Yong Lee1 |
| 소속 | 1Korea Institute of Science and Technology, 2Inha Univ. |
| 키워드 | gold nanorods; aspect ratio; nanorod yield; chloride ions; silver ions; surface plasmon resonance |
