2015年
Nanoporous silver microstructure for single particle surface-enhanced Raman scattering spectroscopy
RSC ADVANCES
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- 巻
- 5
- 号
- 2
- 開始ページ
- 1391
- 終了ページ
- 1397
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/c4ra11890a
- 出版者・発行元
- ROYAL SOC CHEMISTRY
The potential of a nanoporous Ag microstructure (np-AgMs) for use as a single particle for surface-enhanced Raman scattering spectroscopy (SERS), with the added advantages of being easy to manipulate and reusable, was successfully demonstrated. The np-AgMs with interconnected pore and controllable pore size were fabricated from symmetric hexapod AgCl via a galvanic replacement reaction in NaCl solution with zinc (Zn) as the sacrificed metal. The clean surface of np-AgMs enables rapid surface functionalization with easy handling and sample preparation as no particle aggregation occurs. The SERS acquisition spots on the np-AgMs can be visually selected using a normal Raman microscope. SERS spectra of p-aminothiophenol (PATP) with a concentration range of 10 (8)-10 (3) M can be achieved. The position-dependent enhancement of np-AgMs was expendably evaluated. The signal-position correlation was confirmed by electric filed enhancement obtained from Finite-difference time-domain (FDTD) calculation. In addition, the highly stable substrate showed insignificant loss of the enhanced Raman signal after several cycles of chemical re-generation. Finally, the potential application of np-AgMs in label-free detection of biomolecules including hemoprotein, protein without chromophore and DNA strains at low concentration of 500 mu g mL(-1) was demonstrated.
- リンク情報
- ID情報
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- DOI : 10.1039/c4ra11890a
- ISSN : 2046-2069
- Web of Science ID : WOS:000346079900067