title: Extraction of absorption and scattering contribution of metallic nanoparticles toward rational synthesis and application.
abstract: Noble metal nanoparticles have unique localized surface plasmon resonance (LSPR), leading to their strong absorption and scattering in the visible light range. Up to date, the common practice in the selection of nanoparticles for a specific application is still based on the measured extinction spectra. This practice may be erroneous, because the extinction spectra contain both absorption and scattering contribution that may play different roles in different applications. It would be highly desirable to develop an efficient way to obtain the absorption and scattering spectra simultaneously. Herein, we develop a method to use the experimentally measured extinction and scattering signals to extract the absorption and scattering spectra that is in excellent agreement with that simulated by discrete dipole approximation (DDA). The heating curve measurement on the three types of gold nanorods, with almost the same extinction spectra but different absorption and scattering contribution, convincingly reveals an excellent correlation between the heating effect and the absorption strength rather than the extinction strength. The result demonstrates the importance to obtain the scattering and absorption spectra to predict the potential application for different types of nanoparticles, which in turn will screen efficiently nanoparticles for a specific application.
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, ‡The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and §Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
authors.forename: Bi-Ju
authors.initials: BJ
authors.lastname: Liu
authors.forename: Kai-Qiang
authors.initials: KQ
authors.lastname: Lin
authors.forename: Shu
authors.initials: S
authors.lastname: Hu
authors.forename: Xiang
authors.initials: X
authors.lastname: Wang
authors.forename: Zhi-Chao
authors.initials: ZC
authors.lastname: Lei
authors.forename: Hai-Xin
authors.initials: HX
authors.lastname: Lin
authors.forename: Bin
authors.initials: B
authors.lastname: Ren