Theses and Dissertations

ORCID

https://orcid.org/0000-0003-3846-812X

Issuing Body

Mississippi State University

Advisor

Zhang, Dongmao

Committee Member

Wipf, David O.

Committee Member

Creutz, Sidney E.

Date of Degree

12-13-2024

Original embargo terms

Worldwide

Document Type

Graduate Thesis - Open Access

Major

Chemistry

Degree Name

Master of Science (M.S.)

College

College of Arts and Sciences

Department

Department of Chemistry

Abstract

Light absorption and scattering are fundamental properties of matter, particularly significant in nanoscale materials. This study explores how cascading optical processes affect the experimental measurement of absorption and scattering intensities, along with scattering depolarization, in samples containing absorbers and scatterers. The experimental UV–vis spectrum results from the combination of absorption and scattering extinction spectra. However, the maximum measurable extinction may be limited by forward scattered light. Light absorption decreases the intensity of scattered light and influences scattering depolarization. While scattering can reduce absorption along the optical path to the detector, sufficient absorption of the scattered light may counterbalance this effect, leading to minimal overall impact (less than 10%). This research supports the use of the integrating-sphere-assisted resonance synchronous spectroscopic method for accurately quantifying absorption and scattering contributions in UV–vis extinction spectra, providing guidelines to improve the reliability of optical characterization for materials exhibiting absorption and scattering properties.

Download

Included in

Chemistry Commons

Share

COinS