高等学校化学研究 ›› 2011, Vol. 27 ›› Issue (6): 1045-1048.
Preparation of Organic Nanoparticle Colloids by Laser Ablation and Their Nonlinear Optical Properties
YANG Jie1, WANG Rui1, DING Ran1, LI Ai-wu1, YU Yong-sen1, WANG Ji-ping2* and YANG Han1*
- 1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Department of Radiology, The First Hospital of Jilin University, Changchun 130021, P. R. China
Preparation of Organic Nanoparticle Colloids by Laser Ablation and Their Nonlinear Optical Properties
YANG Jie1, WANG Rui1, DING Ran1, LI Ai-wu1, YU Yong-sen1, WANG Ji-ping2* and YANG Han1*
- 1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Department of Radiology, The First Hospital of Jilin University, Changchun 130021, P. R. China
摘要： Suspension of micrometer-sized 1,4-bis(4-methylstyryl)benzene(p-MSB) was converted into colloidal nanocrystal solution by irradiation with an femtosecond laser(800 nm, 1 kHz). The prepared nanocrystals were rectangular with ca. 100 nm in size. The same crystal structure as that of bulk crystals was confirmed by X-ray diffraction measurement. UV-Vis spectra and emission spectra of the nanoparticle dispersions in dichloromethane(poor solvent) were examined. The nanocrystal exhibits large quantum yield(89%). The nonlinear optical properties of the nanocrystals were further studied by Z-scan technique with femtosecond laser duration of 120 fs at a wavelength of 800 nm. The results show that the nanocrystals exhibit strong nonlinear absorption.