Constructive nanolithography: Site-defined silver self-assembly on nanoelectrochemically patterned monolayer templates

Advanced Materials

Volumn 12, Issue 6, 2000, Pages 424-429

  Maoz, Rivka ^a   Frydman, Eli ^a   Cohen, Sidney R ^a   Sagiv, Jacob ^a  

^a WEIZMANN INSTITUTE OF SCIENCE   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

COMPOSITION EFFECTS; ELECTROCHEMISTRY; MONOLAYERS; NANOSTRUCTURED MATERIALS; NANOTECHNOLOGY; PARTICLES (PARTICULATE MATTER); REDUCTION; SILANES; SULFUR COMPOUNDS; SURFACE PHENOMENA;

ELECTROCHEMICAL REDUCTION; NANOPARTICLES; SELF-ASSEMBLED MONOLAYERS (SAM); SURFACE PATTERNING;

SILVER;

EID: 0033881966     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-4095(200003)12:6<424::AID-ADMA424>3.0.CO;2-S     Document Type: Article

References (26)

1. R. Maoz, S. R. Cohen, J. Sagiv, Adv. Mater. 1999, 11, 55.
2. Micropipette delivery may allow targeting of the reducing solution to sub-micron surface areas.
3. See, for example: a) N. Mino, S. Ozaki, K. Ogawa, M. Halada, Thin Solid Films 1994, 243, 374.
4. b) M. J. Lercel, H. G. Craighead, A. N. Parikh, K. Seshadri, D. L. Allara. Appl. Phys. Lett. 1996, 68, 1504.
5. c) J. H. Thywissen, K. S. Johnson, R. Younkin, N. H. Dekker, K. K. Berggren, A. P. Chu, M. Prentiss, S. A. Lee, J. Vac. Sci. Technol. B 1997, 15, 2093.
6. d) Y. Xia, G. M. Whitesides, Angew. Chem. Int. Ed. 1998, 37, 550.
7. e) F. K. Perkins, E. Dobisz, S. L. Brandow, T. S. Koloski, J. M. Calvert, K. W. Rhee, J. E. Kosakowski, C. R. K. Marrian, J. Vac. Sci. Technol. B 1994, 12, 3725.
8. f) J. K. Schoer, C. B. Ross, R. M. Crooks, T. S. Corbitt, M. J. Hampden-Smith, Langmuir 1994, 10, 615.
9. g) H. Sugimura, K. Okiguchi, N. Nakagiri, M. Miyashita, J. Vac. Sci. Technol. B 1996, 14, 4140.
10. h) D. C. Tully, K. Wilder, J. M. J. Fréchet, A. R. Trimble, C. F. Quate, Adv. Mater. 1999, 11, 314.
11. a) E. Frydman, Ph.D. Thesis, Weizmann Institute, submitted September 1999.
12. b) E. Frydman, R. Maoz, J. Sagiv, unpublished.
13. The water contact angles characteristic of TFSMs obtained from mixed precursor monolayers with a molar ratio NTS/OTS = 1/2 vary from about 70° (adv.) and 64° (rec.) on the silver-free surface, to about 67° (adv.: rec.) on the surface fully loaded with Ag ions.
14. 2S with pure NTS monolayers (see Experimental) may subsequently be converted to thiol groups by chemical reduction with a suitable reducing reagent [4].
15. See, for example: a) H. Schmidt, Histochemistry 1981, 71, 89.
16. b) G. Danscher, J. D. R. Nörgaard, J. Hystochem. Cytochem. 1983, 31, 1394.
17. c) G. B. Birrel, D. L. Habilstone, K. K. Hedberg, O. H. Griffith, J. Histochem. Cytochem. 1986, 34, 339.
18. E. Braun, Y. Eichen, U. Sivan, G. Ben-Yoseph, Nature 1998, 391, 775.
19. Lateral smearing of the deposited metal was occasionally observed during AFM imaging in the contact mode, because of the strong lateral forces exerted by the tip in this mode. This effect was particularly detrimental in the imaging ot the small particles generated during the initial nanoelectrochemical reduction step (Fig. 1. upper path). In order to obtain satisfactory images it was necessary to switch from the contact mode used in pattern inscription to imaging in the intermittent contact mode. This could he conveniently accomplished with an NT-MDT P47 instrument (see Fig. 4 and Experimental) purchased toward the final stages of the work reported in this communication.
20. Because of the convolution with the tip, the measured lateral dimensions of the particles may be overestimated.
21. F. Forouzan, A. J. Bard, J. Phys. Chem. B 1997, 101, 10876.
22. R. D. Piner, C. A. Mirkin, Langmuir 1997, 13, 6864.
23. H. Sugimura, N. Nakagiri, J. Vac. Sci. Technol. A 1996, 14, 1223.
24. An analogous "inverted" process, referred to as "dip-pen" nanolithography, was recently reported, whereby a molecular "ink" made of monolayer-forming thiol molecules is mechanically delivered from a "ink-loaded" AFM tip acting as "pen" to a solid gold surface acting as "paper": R. D. Piner, J. Zhu, F. Xu, S. Hong, C. A. Mirkin, Science 1999, 283, 661.
25. H. Ahmed, J. Vac Sci. Technol. B 1997, 15, 2101.
26. The NTS/OTS molar ratio on the surface was found (from quantitative FTIR spectra) to be practically identical to that of the adsorption solution used for the self-assembly of the mixed monolayer [4].