Naslov
Comparison of high resolution transmission electron microscopy and low frequency Raman scattering in determination of particles size distribution of nanosized TiO2

Autori
Ivanda, Mile (predavač) ; Tonejc, Anđelka M. ; Djerdj, Igor ; Gotić, Marijan ; Musić, Svetozar ; Mariotto, Gino

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts Book of the 1st International workshop on nanoscale spectroscopy and its applications to semiconductor research / Heun, Stefano - Trst : Elettra Sincrotrone Trieste, 2000, 48-48

Skup
1st International workshop on nanoscale spectroscopy and its applications to semiconductor research

Mjesto i datum
Trst, Italija, 11.12.2000. - 15.12.2000

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
TiO2 nanoparticles; size distribution; Raman scattering

Sažetak
Size distribution of TiO2 nanoparticles synthesized by sol-gel method are determined by high resolution transmission electron microscopy (HRTEM) and compared with those determined by low frequency Raman scattering (LFRS). The methodology for the determination of nanosized particle distribution by LFRS is described. It is based on n-1 dependence of the Raman light to vibration coupling coefficient and on the fact that each nanocrystallite of diameter D vibrates with its own eigen frequency n~1/D. The effect of the particle vibrational lifetime on the shape of distribution is analyzed and found to be negligible for the weakly connected TiO2 particles. Fig. 1 shows comparison of the HRTEM and LFRS TiO2 size distributions. On the basis of comparison of particle size distributions deduced by HRTEM and LFRS on 15 different samples, the Raman spectroscopy shows to be simple, fast method that has favorable statistic over the macroscopic probe volume and that enables ''in situ'' measurements.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA