Thermal-lensing measurement of particle thermophoresis in aqueous dispersions

被引:101
作者
Rusconi, R [1 ]
Isa, L [1 ]
Piazza, R [1 ]
机构
[1] Politecn Milan, Dipartimento Ingn Nucl, I-20133 Milan, Italy
关键词
D O I
10.1364/JOSAB.21.000605
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We show that thermophoresis (particle drift driven by thermal gradients) in aqueous solutions can be measured by using an all-optical thermal-lensing setup, where a temperature gradient is set by a near-infrared laser beam with no need of light-absorbing dyes. After discussing the principles of the method, we study by numerical simulation the nature and extent of parasitic thermal-convection effects, and we describe an optical setup designed to limit them. We finally present preliminary results on thermophoresis in micellar solutions and colloidal dispersions. (C) 2004 Optical Society of America.
引用
收藏
页码:605 / 616
页数:12
相关论文
共 29 条
[1]   THERMAL SELF-ACTIONS OF LASER BEAMS [J].
AKHMANOV, SA ;
KRINDACH, DP ;
MIGULIN, AV ;
SUKHORUKOV, AP ;
KHOKHLOV, RV .
IEEE JOURNAL OF QUANTUM ELECTRONICS, 1968, QE 4 (10) :568-+
[2]   Generalization of the thermal lens model formalism to account for thermodiffusion in a single-beam Z-scan experiment:: determination of the Soret coefficient [J].
Alves, S ;
Bourdon, A ;
Neto, AMF .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2003, 20 (04) :713-718
[3]   On the analytical use of the Soret-enhanced thermal lens signal in aqueous solutions [J].
Arnaud, N ;
Georges, J .
ANALYTICA CHIMICA ACTA, 2001, 445 (02) :239-244
[4]  
Bialkowski S., 2019, Photothermal spectroscopy methods
[5]   Trapping of DNA by thermophoretic depletion and convection [J].
Braun, D ;
Libchaber, A .
PHYSICAL REVIEW LETTERS, 2002, 89 (18) :1-188103
[6]  
Busse F.H., 1989, MANTLE CONVECTION PL, P23
[7]   COMPARISON OF MODELS DESCRIBING THE THERMAL LENS EFFECT [J].
CARTER, CA ;
HARRIS, JM .
APPLIED OPTICS, 1984, 23 (03) :476-481
[8]   PATTERN-FORMATION OUTSIDE OF EQUILIBRIUM [J].
CROSS, MC ;
HOHENBERG, PC .
REVIEWS OF MODERN PHYSICS, 1993, 65 (03) :851-1112
[9]   TIME-DEPENDENT SORET TRANSPORT - APPLICATIONS TO BRINE AND MAGMA [J].
CYGAN, RT ;
CARRIGAN, CR .
CHEMICAL GEOLOGY, 1992, 95 (3-4) :201-212
[10]  
De Groot SR., 1962, NONEQUILIBRIUM THERM