Dielectric properties of sols of silver nanoparticles capped by alkyl carboxylate ligands

作者: G. F. Novikov , M. V. Gapanovich , E. V. Rabenok , L. M. Bogdanova , L. I. Kuzub

DOI: 10.1007/S11172-011-0066-2

关键词:

摘要: Sols of silver nanoparticles in toluene were studied by broadband dielectric spectroscopy (10−3–105 Hz). The frequency dependences the specific alternating current (ac) conductivity and complex electric modulus used to estimate temperature/frequency intervals long- short-range charge transfer occurs, respectively. A considerable increase (by more than 30 °C) Vogel temperature T0 glass transition Tg sols compared with pure solvent was found. It can be hypothesized that these cooperative effects reflect initial stage superlattice formation. Although characteristics are generally controlled relaxation, response observed high-frequency range (1–103 Hz) at low temperatures (from −50 +10 °C). This results from presence solution. is supposed relaxation caused motion ion impurities on Ag nanoparticle surface within carboxylate ligands shell. properties films strongly depend both conditions film preparation. Like sols, direct (dc) due impurities.

参考文章(19)
M. Murai, H. Nakayama, K. Ishii, Crystallization and glass transition of chlorobenzene/toluene binary amorphous systems Journal of Thermal Analysis and Calorimetry. ,vol. 69, pp. 953- 959 ,(2002) , 10.1023/A:1020632728369
R. Böhmer, K. L. Ngai, C. A. Angell, D. J. Plazek, Nonexponential relaxations in strong and fragile glass formers Journal of Chemical Physics. ,vol. 99, pp. 4201- 4209 ,(1993) , 10.1063/1.466117
K. H. Fischer, Spin glasses (I) Physica Status Solidi B-basic Solid State Physics. ,vol. 116, pp. 357- 414 ,(1983) , 10.1002/PSSB.2221160202
Kazunao Yamamoto, Hiroshi Namikawa, Conduction Current Relaxation of Inhomogeneous Conductor I Japanese Journal of Applied Physics. ,vol. 27, pp. 1845- 1851 ,(1988) , 10.1143/JJAP.27.1845
E Neagu, P Pissis, L Apekis, J L Gomez Ribelles, Dielectric relaxation spectroscopy of polyethylene terephthalate (PET) films Journal of Physics D. ,vol. 30, pp. 1551- 1560 ,(1997) , 10.1088/0022-3727/30/11/003
Dwight Viehland, S. Jang, L. Eric Cross, Manfred Wuttig, The dielectric relaxation of lead magnesium niobate relaxor ferroelectrics Philosophical Magazine Part B. ,vol. 64, pp. 335- 344 ,(1991) , 10.1080/13642819108207624