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AFM and SEM Characterization of the CdS Nanoparticles Incorporated into the Opal Crystal

Y. Barnakov*, S. Tsunegawa(a), A. Kasuya(a), V. Poborchii(b), Y. Nishina(b), S. Samoilovich(c)

Buryat Institute of Natural Sciences, Institute for Materials Research, Ioffe Physico-Technical Institute, Moscow State University
a. Institute for Materials Research, Tohoku University, Sendai 980-77, Japan
b. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, St. Petersburg 198041, Russia
c. Moscow State University, Moscow, Russia

This is an abstract for a poster to be presented at the Fifth Foresight Conference on Molecular Nanotechnology.

We have synthesized and characterized CdS nanoparticles incorporated into the voids of opal crystal. This is the first time of AFM observation of pure and CdS doped opal crystal. It is shown, the size of CdS nanoparticle, which getting from AFM observation of CdS doped opal, is varied 70-90 nm. It is the contradiction of the results of Raman spectra of the CdS-opal sample, from what the frequency vibrations of this sample are corresponded to the size of the Cds nanoparticles 10-30 nm. The additional experiment - the high resolution SEM observation had shown - the size of CdS nanoparticles is 10-30 nm. By analysis of this results, we consider during the AFM scanning the tip removes some part of the CdS (may be some boundary between CdS nanoparticles with 10-30 nm sizes). It is well-known "sweeping" process. It has proposed, during the AFM tip scanning of the CdS-opal surface, that the measurement of the bonding force from the force cuver, can give us the order of the bonding force of some units of 10-30 nm CdS-nanoparticle. The getting sample CdS-opal is a great candidate for the photonic crystal.

*Corresponding Address:
Dr. Yuri A. Barnakov, Buryat Institute of Natural Sciences, Siberian Branch of the Russian Academy of Sciences, St. Sah'yanovoi 6, Ulan-Ude, 670042 Buryat Republic, Russia, ph: 7-30122-32107, fax: 7-30122-30134, email:
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