Surface-enhanced Raman scattering of single adenine molecules on silver colloidal particles

Chemistry Letters

Volumn , Issue 8, 2001, Pages 834-835

  Maruyama, Yoshihiro ^a   Ishikawa, Mitsuru ^a   Futamata, Masayuki ^b  

^a JT RES CENTER FOR ATOM TECHNOLOGY   (Japan)

^b NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY AIST   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0035538888     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.2001.834     Document Type: Article

References (18)

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10. H. Xu, E. J. Bjemeld, M. Käll, and L. Börjesson, Phys. Rev. Lett., 83, 4357 (1999).
11. A previous study (K. Kneipp, H. Kneipp, B. Kartha, R. M. Manoharan, G. Deinum, I. Itzkan, R. R. Dasari, and M. S. Feld, Phys. Rev., E57, R6281 (1998)) reported single-molecule detection and spectroscopy of adenine. This study, however, like refs 7 and 9 detected SERS intensities of adenine on SERS-active hot particles subject to Brownian movement in a probe volume in solution using burst detection technique. Without imaging technique, no one identifies where are hot particles and what percentages of all particles are hot particles. Moreover, the temporal trajectory of SERS intensities on a single hot particle cannot be obtained by using burst detection technique.
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17. -6 M or higher concentrations. These unexpected phenomena were not observed for R6G.
18. To increase the number of cationic adenine molecules, the pH of the solution was changed. Unfortunately under acidic conditions (pH = 3-4) Ag particles formed precipitations, which are much larger than hot particles composed of aggregated particles. Thus, it is impossible to implement SERS experiment using acidic solutions as it is.