Date of Graduation

Spring 2018

Degree

Degree Name Master of Accountancy Master of Science in Applied Anthropology Master of Science in Applied Behavior Analysis Master of Applied Second Language Acquisition Master of Science in Athletic Training Doctor of Audiology Master of Science in Biology Master of Business Administration Master of Science in Cell and Molecular Biology Master of Science in Chemistry Master of Science in Child Life Studies Master of Arts in Communication Master of Science in Communication Sciences and Disorders Master of Science in Computer Information Systems Master of Science in Counseling Specialist in Education in Counseling and Assessment Master of Science in Criminology and Criminal Justice Master of Science in Cybersecurity Master of Science in Defense and Strategic Studies Master of Science in Early Childhood and Family Development Master of Science in Education in Educational Administration Master of Science in Education in Educational Technology Master of Science in Education in Elementary Education Master of Arts in English Master of Science in Geospatial Sciences Master of Global Studies Master of Health Administration Master of Science in Health Promotion and Wellness Management Master of Arts in History Master of Science in Interdisciplinary Studies Master of Science in Education in Literacy Master of Science in Materials Science Master of Science in Mathematics Master of Music Master of Natural and Applied Science in Agriculture Master of Natural and Applied Science in Biology Master of Natural and Applied Science in Chemistry Master of Natural and Applied Science in Computer Science Master of Natural and Applied Science in Geography, Geology, and Planning Master of Natural and Applied Science in Mathematics Master of Natural and Applied Science in Physics Master of Science in Nursing Doctor of Nursing Practice Master of Occupational Therapy Master of Science in Plant Science (Agriculture) Master of Science in Plant Science (Biology) Master of Science in Plant Science (Chemistry) Master of Science in Project Management Master of Science in Psychology Master of Public Administration Master of Public Health Master of Arts in Religious Studies Master of Science in Education in Secondary Education in Agriculture Master of Science in Education in Secondary Education in Art Master of Science in Education in Secondary Education in Biology Master of Science in Education in Secondary Education in Chemistry Master of Science in Education in Secondary Education in Earth Science Master of Science in Education in Secondary Education in English Master of Science in Education in Secondary Education in Family and Consumer Sciences Master of Science in Education in Secondary Education in Geography Master of Science in Education in Secondary Education in History Master of Science in Education in Secondary Education in Mathematics Master of Science in Education in Secondary Education in Natural Science Master of Science in Education in Secondary Education in Physical Education Master of Science in Education in Secondary Education in Physics Master of Science in Education in Secondary Education in Social Studies Master of Science in Education in Secondary Education in Speech and Theatre Master of Science in Education in Special Education Master of Fine Arts in Visual Studies Master of Arts in Writing Master of Arts in Theatre

Department

Physics, Astronomy, and Materials Science

Committee Chair

Robert Mayanovic

Keywords

anisotropic, plasmonic, synthesis, spectra, nanoparticles

Subject Categories

Atomic, Molecular and Optical Physics | Physics | Polymer Chemistry

Abstract

The anisotropic nanostructures of noble metals are of great interest for plasmonic applications due to the possibility of tuning the localized surface plasmon resonance (LSPR) across the UV-VIS-NIR without sacrificing the linewidth as well as to achieve larger local field enhancement. Here, we report a simple and promising fabrication method of anisotropic gold nanostructures film using polystyrene-b-2vinylpyridine (PS-b-P2VP) block copolymers (BCP) as a template. In this approach, PS-b-P2VP spherical micelles were first synthesized as a template followed by selective deposition of Au precursor inside P2VP core of the micelles using ethanol solution of Au salt. Subsequently, heat treatment of the precursor deposited BCP films followed by removal of the BCP template produced anisotropic gold nanostructures of various shapes, such as octahedron, icosahedron, tetrahedron, and triangular prism. A temperature- and time-dependent annealing of the fabricated nanostructures led to the formation of clusters at higher temperatures. Furthermore, measurement of ensemble extinction spectra of the anisotropic Au nanoparticle films showed two broad distinct LSPR peaks; one in the visible range (~ 660 nm), and the other in the NIR range (~ 875 nm). The electrodynamic simulation showed that octahedron and icosahedron nanoparticles are responsible for the LSPR response in the visible; whereas the triangular shapes are responsible for the LSPR response in the NIR. Our work is expected to open up a new direction of synthesis of anisotropic nanostructures of noble metals that can be utilized to tune the LSPR response across the UV-VIS-NIR range using a simple BCP template-based method.

Copyright

© Calbi J. Gunder

Open Access

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