Coherent excitation of acoustic breathing modes in bimetallic core-shell nanoparticles

被引:88
作者
Hodak, JH
Henglein, A
Hartland, GV [1 ]
机构
[1] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
[2] Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 21期
关键词
D O I
10.1021/jp000578v
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The low-frequency acoustic breathing modes in Au-Pb core-shell nanoparticles have been studied by time-resolved spectroscopy. The frequency of the breathing mode was determined for a series of samples with a 47 nm diameter Au core and Pb shells of different thickness. The measured frequencies decrease with increasing Pb content, but not to the extent expected from a classical model for a homogeneous sphere. These results show that the acoustic breathing modes of metallic core-shell particles are significantly perturbed when the two metals have different elastic properties.
引用
收藏
页码:5053 / 5055
页数:3
相关论文
共 31 条
[1]   Effect of cobalt-59 self-decoupling on the solid-state 31P CP/MAS NMR spectra of cobaloximes [J].
Schurko, Robert W. ;
Wasylishen, Roderick E. ;
Nelson, John H. .
Journal of physical chemistry, 1996, 100 (20) :8053-8056
[2]   ELECTRON DYNAMICS IN COPPER METALLIC NANOPARTICLES PROBED WITH FEMTOSECOND OPTICAL PULSES [J].
BIGOT, JY ;
MERLE, JC ;
CREGUT, O ;
DAUNOIS, A .
PHYSICAL REVIEW LETTERS, 1995, 75 (25) :4702-4705
[3]   Ultrafast induced electron-surface scattering in a confined metallic system [J].
Del Fatti, N ;
Flytzanis, C ;
Vallée, F .
APPLIED PHYSICS B-LASERS AND OPTICS, 1999, 68 (03) :433-437
[4]   Coherent acoustic mode oscillation and damping in silver nanoparticles [J].
Del Fatti, N ;
Voisin, C ;
Chevy, F ;
Vallée, F ;
Flytzanis, C .
JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (23) :11484-11487
[5]  
Dubrovskiy V. A., 1981, Izvestiya Academy of Sciences USSR, Physics of the Solid Earth, V17, P494
[6]   VIBRATION EIGENMODES AND SIZE OF MICROCRYSTALLITES IN GLASS - OBSERVATION BY VERY-LOW-FREQUENCY RAMAN-SCATTERING [J].
DUVAL, E ;
BOUKENTER, A ;
CHAMPAGNON, B .
PHYSICAL REVIEW LETTERS, 1986, 56 (19) :2052-2055
[7]   Detection and size determination of Ag nanoclusters in ion-exchanged soda-lime glasses by waveguided Raman spectroscopy [J].
Ferrari, M ;
Gonella, F ;
Montagna, M ;
Tosello, C .
JOURNAL OF APPLIED PHYSICS, 1996, 79 (04) :2055-2059
[8]   Raman scattering from acoustic phonons confined in Si nanocrystals [J].
Fujii, M ;
Kanzawa, Y ;
Hayashi, S ;
Yamamoto, K .
PHYSICAL REVIEW B, 1996, 54 (12) :R8373-R8376
[9]   Radiolytic control of the size of colloidal gold nanoparticles [J].
Henglein, A ;
Meisel, D .
LANGMUIR, 1998, 14 (26) :7392-7396
[10]   Ultrafast study of electron-phonon coupling in colloidal gold particles [J].
Hodak, J ;
Martini, I ;
Hartland, GV .
CHEMICAL PHYSICS LETTERS, 1998, 284 (1-2) :135-141