Surface-enhanced Raman scattering from functionalized self-assembled monolayers. 2. Distance dependence of enhanced Raman scattering from an azobenzene terminal group

Journal of Physical Chemistry B

Volumn 101, Issue 41, 1997, Pages 8221-8224

  Ye, Qi ^a   Fang, Jianxin ^a,b   Sun, Li ^a,c  

^a University of Minnesota   (United States)

^b NANKAI UNIVERSITY   (China)

^c TEXAS A AND M UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AROMATIC COMPOUNDS; MONOLAYERS; ORGANIC COMPOUNDS; RAMAN SCATTERING;

SELF-ASSEMLED MONOLAYERS; SURFACE-ENHANCED RAMAN SCATTERING;

SURFACE PROPERTIES;

EID: 0031561253     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp970869c     Document Type: Article

References (50)

1. (a) Birke, R. L.; Lu, T.; Lombardi, J. R. In Techniques for Characterization of Electrodes and Electrochemical Processes; Varma, R., Shelman, J. R., Eds.; Wiley: New York, 1991.
2. (b) Moskovits, M. Rev. Mod. Phys. 1985, 57, 783.
3. (a) Murray, C. A.; Allara, D. L.; Rhinewine, M. Phys. Rev. Lett. 1981, 46, 57-60.
4. (b) Murray, C. A.; Allara, D. L. J. Chem. Phys. 1982, 76, 1290-1303.
5. Otto, A. J. Raman Spectrosc. 1991, 22, 743-752.
6. (a) Cotton, T. M.; Kim, J.-H.; Chumanov, G. D. J. Raman Spectrosc. 1991, 22, 729-742.
7. (b) Garrell, R. L. Anal. Chem. 1989, 61, 402A-411A.
8. (c) Zhang, W.; Vivoni, A.; Lombardi, J. R.; Birke, R. L. J. Phys. Chem. 1995, 99, 12846-12857.
9. (d) Macdonald, I. D. G.; Smith, W. E. Langmuir 1996, 12, 706-713.
10. (e) Ford, J. F.; Vickers, T. J.; Mann, C. K.; Schlenoff, J. B. Langmuir 1996, 12, 1944-1946.
11. (a) Carron, K.; Peltersen, L.; Lewis, M. Environ. Sci. Technol. 1992, 26, 1950-1954.
12. (b) Thompson, W. R.; Pemberton, J. E. Anal. Chem. 1994, 66, 3362-3370.
13. (c) Crooks, R. M.; Chailapakul, O.; Ross, C. B.; Sun, L.; Schoer, J. K. In Chemically Sensitive Interfaces; Mallouk, T. E., Harrison, D. J., Eds; ACS Symposium Series; American Chemical Society: Washington, DC, 1993.
14. (d) Häussling, L.; Ringsdorf, H.; Schmitt, F.-J.; Knoll, W. Langmuir 1991, 7, 1837-1840.
15. (e) Prime, K. L.; Whitesides, G. M. Science 1991, 252, 1164-1167.
16. Cotton, T. M.; Uphaus, R. A.; Mobius, D. J. Phys. Chem. 1986, 90, 6071-6073.
17. Kovacs, G. J.; Loutfy, R. O.; Vincett, P. S.; Jennings, C.; Aroca, R. Langmuir 1986, 2, 689-694.
18. Tsen, M.; Sun, L. Anal. Chim. Acta 1995, 307, 333-340.
19. (a) Caldwell, W. B.; Chen, K.; Herr, B. R.; Mirkin, C. A.; Hulteen, J. C.; Van Duyne, R. P. Langmuir 1994, 10, 4109-4115.
20. (b) Caldwell, W. B.; Campbell, D. J.; Chen, K.; Herr, B. R.; Mirkin, C. A.; Malik, A.; Durbin, M. K.; Dutta, P.; Huang, K. G. J. Am. Chem. Soc. 1995, 117, 6071-6082.
21. Xiao, T.; Ye, Q.; Sun, L. J. Phys. Chem. B 1997, 101, 632.
22. Gersten, J. I.; Nitzan, A. J. Chem. Phys. 1980, 73, 3023.
23. Johnson, P. B.; Christy, R. W. Phys. Rev. B 1972, 6, 4370.
24. (a) Lin-Vien, D.; Colthup, N. B.; Fateley, W. G.; Grasselli, J. G. The Handbook of Infrared and Raman Characteristic Frequencies of Organic Molecules; Academic Press: San Diego, 1991; p 198.
25. (b) Trotter, P. J. Appl. Spectrosc. 1977, 30, 30-35.
26. (c) Hacker, H. Spectrochim. Acta 1965, 21, 1989.
27. The normal and surface Raman scattering cross sections were measured according to the method in ref 10.
28. The molar absorption coefficients were either measured in our lab or found in the literature. For example, see the following. Hirayama, K. Handbook of Ultraviolet and Visible Absorption Spectra of Organic Compounds; Plenum Press: New York, 1967.
29. Bain, C. D.; Troughton, E. B.; Tao, Y.-T.; Evall, J.; Whitesides, G. M.; Nuzzo, R. G. J. Am. Chem. Soc. 1989, 111, 321-335.
30. (a) Creighton, J. A. In Spectroscopy of Surfaces; Clark, R. J. H., Hester, R. E., Eds.; Wiley: New York, 1988.
31. (b) Carron, K. T.; Hurley, L. G. J. Phys. Chem. 1991, 95, 9979.
32. (a) Walczak, M. M.; Chung, C.; Stole, S. M.; Widrig, C. A.; Porter, M. D. J. Am. Chem. Soc. 1991, 113, 2370-2378.
33. (b) Bryant, M. A.; Pemberton, J. E. J. Am. Chem. Soc. 1991, 113, 8284-8293.
34. The decay rate as predicted by the GN model decreases as the aspect ratio increases or as the overall size decreases. Consequently, there exist more than one set of aspect ratio and size combinations, all leading to a good fit. The parameters in Figure 2 were selected by considering the measured island sizes and a plausible aspect ratio.
35. (a) Van Duyne, R. P.; Hulteen, J. C.; Treichel, D. A. J. Chem. Phys. 1993, 99, 2101-2115.
36. (b) Schlegel, V. L.; Cotton, T. M. Anal. Chem. 1991, 63, 241.
37. (a) Semin, D. J.; Rowlen, K. L. Anal. Chem. 1994, 66, 4324.
38. (b) Roark, S. E.; Rowlen, K. L. Anal. Chem. 1994, 66, 261.
39. Campion, A.; Ivanecky, J. E., III; Child, C. M.; Foster, M. J. Am. Chem. Soc. 1995, 117, 11807-11808.
40. Many studies have shown that SAMs are structurally more ordered than LB films. For early reviews, see the following. (a) Swalen, J. D.; Allara, D. L.; Andrade, J. D.; Chandross, E. A.; Garoff, S.; Isreaelachvili, J.; McCarthy, T. J.; Murray, R.; Pease, R. F.; Rabolt, J. F.; Wynne, K. J.; Yu, H. Langmuir 1987, 3, 932-950. (b) Ulman, A. An Introduction to Ultrathin Organic Films: From Langmuir-Blodgett to Self-Assembly, Academic Press: Boston, 1991. (c) Dubois, L. H.; Nuzzo, R. G. Annu. Rev. Phys. Chem. 1992, 43, 437-463.
41. Many studies have shown that SAMs are structurally more ordered than LB films. For early reviews, see the following. (a) Swalen, J. D.; Allara, D. L.; Andrade, J. D.; Chandross, E. A.; Garoff, S.; Isreaelachvili, J.; McCarthy, T. J.; Murray, R.; Pease, R. F.; Rabolt, J. F.; Wynne, K. J.; Yu, H. Langmuir 1987, 3, 932-950. (b) Ulman, A. An Introduction to Ultrathin Organic Films: From Langmuir-Blodgett to Self-Assembly, Academic Press: Boston, 1991. (c) Dubois, L. H.; Nuzzo, R. G. Annu. Rev. Phys. Chem. 1992, 43, 437-463.
42. Many studies have shown that SAMs are structurally more ordered than LB films. For early reviews, see the following. (a) Swalen, J. D.; Allara, D. L.; Andrade, J. D.; Chandross, E. A.; Garoff, S.; Isreaelachvili, J.; McCarthy, T. J.; Murray, R.; Pease, R. F.; Rabolt, J. F.; Wynne, K. J.; Yu, H. Langmuir 1987, 3, 932-950. (b) Ulman, A. An Introduction to Ultrathin Organic Films: From Langmuir-Blodgett to Self-Assembly, Academic Press: Boston, 1991. (c) Dubois, L. H.; Nuzzo, R. G. Annu. Rev. Phys. Chem. 1992, 43, 437-463.
43. A recent report has shown that even SAMs covering small metal clusters of 2.4 nm diameter can act as good spacers for modulating the electron hopping between metal clusters. Terrill, R. H.; Postlethwaite, T. A.; Chen, C.-H.; Poon, C.-D.; Terzis, A.; Chen, A.; Hutchison, J. E.; Clark, M. R.; Wignall, G.; Londono, J. D.; Superfine, R.; Falvo, M.; Johnson, C. S., Jr.; Samulski, E. T.; Murray, R. W. J. Am. Chem. Soc. 1995, 117, 12537-12548.
44. We are not aware of any convenient method for quantifying the defects within a SAM on Ag islands. Instead, we have studied defects within t-4MAZ SAMs on Au electrodes. Our results show that the defect density for a t-4MAZ SAM is low and comparable to that for a well-ordered SAM of n-alkanethiol containing the same number of methylene units. See Supporting Information for details.
45. Sun, L. Ph.D. Thesis, Northwestern University, Evanston, IL, 1990.
46. (a) Damodara Das, V.; Murali Sastry M. S. J. Appl. Phys. 1986, 59, 3184.
47. (b) Andersson, T.; Granqvist, C. G. J. Appl. Phys. 1977, 48, 1673.
48. (a) Freeman, R. G.; Grabar, K. C.; Allison, K. J.; Bright, R. M.; Davis, J. A.; Guthrie, A. P.; Hommer, M. B.; Jackson, M. A.; Smith, P. C.; Walter, D. G.; Natan, M. J. Science 1995, 267, 1629-1632.
49. (b) Li, W.; Virtanen, J. A.; Penner, R. M. J. Phys. Chem. 1994, 98, 11751.
50. (c) Nie, S.; Emory, S. R. Science 1997, 275, 1102-1106.