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분자 분광학 및 동력학 연구단
분자 분광학 및 동력학 연구단
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Unique Scattering Properties of Silicon Nanowires Embedded with Porous Segments

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Title
Unique Scattering Properties of Silicon Nanowires Embedded with Porous Segments
Author(s)
Lee, Hoo-Cheol; Lee, Soon-Jae; Kim, Jungkil; Kim, Kyoung-Ho; Jin-Sung Park; Hwang, Min-Soo; Lee, Jung Min; Jeong, Kwang-Yong; Hong-Gyu Park
Publication Date
2019-06
Journal
ACS APPLIED MATERIALS & INTERFACES, v.11, no.23, pp.21094 - 21099
Publisher
AMER CHEMICAL SOC
Abstract
© 2019 American Chemical Society.The development of advanced imaging tools is important for the investigation of the fundamental properties of nanostructures composed of single or multiple nanomaterials. However, complicated preparation processes and irreversible alterations of the samples to be examined are inevitable in most current imaging techniques. In this work, we developed a simple method based on polarization-resolved light scattering measurements to characterize the structural and optical properties of complex nanomaterials. In particular, we examined a single Si nanowire embedded with porous Si segments, in which the porous Si could not be easily distinguished from solid Si by scanning electron microscopy. The dark-field optical images and polarization-resolved scattering spectra showed unique optical features of porous and solid Si. In particular, the porosity, diameter, and number of porous Si segments in the single Si nanowire were identified from the scattering measurements. In addition, we performed systematic optical simulations based on the effective medium model in individual porous and solid Si nanowires. A good agreement between the simulation and measurement results enabled the estimation of the structural parameters of the nanowires, such as diameter and porosity. We believe that our method will be useful for analyzing the structural and optical properties of nanomaterials prior to using complicated and uneconomical imaging tools
URI
https://pr.ibs.re.kr/handle/8788114/6159
ISSN
1944-8244
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > Journal Papers (저널논문)
Files in This Item:
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