Julia J. Chang
PhD candidate, Materials Science and Engineering, Iowa State University
Phone:
515-735-6651
Email:
Address:
Ames, IA, 50010
Date of Birth:
Dec. 9th, 1993
Hello! This is Julia!
I am currently a PhD student in MSE department of ISU. My research focus is the synthesis, processing, characterization and application of semiconductor and metal nano-materials, with special interest in studying optical and electro-chemical properties of colloidal semiconductor nanoparticles as well as liquid metal nanoparticles. From my PhD study, I am now equipped with:
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5-year experience in solution phase synthesis, thin-film processing, photonic property and catalytic performance study of semiconductor and metal nanoparticles. Leading 3-year Intel project with 400K grants focusing on synthesis of colloidal Si, SiC, InN and TiN nanoparticles.
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4-year experience in nanoparticle/thin film characterizations. Professional in 10+ characterizing methods and data analysis.
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1-year experience in preparation (CVD) and performance analysis (CV) of supercapacitor electrode materials.
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Participation in Environmental & Design project by assisting in biomass analysis, polymer processing and sterile experimentation.
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Experienced in chemical engineering unit design by applying AutoCAD and ASPENplus.
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12 credit ex-curriculum courses taken from Physics department focusing on Condensed Matter Physics.
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Self-learned MATLAB coding focusing on image processing by machine learning.
EDUCATIONAL EXPERIENCE
2015-2020
2011-2015
Iowa State University (ISU), Ames, IA, US
Ph.D., Materials Science and Engineering (GPA: 3.70/4.00)
China University of Mining and Technology, Beijing (CUMTB), China
Bachelor of Engineering, Chemical Engineering (GPA: 3.84/4.00)
RESEARCH INTERESTS & PUBLICATIONS
Colloidal nanoparticle synthesis:
Due to precise controls of synthesizing conditions, ligand-assisted non-hydroic method is powerful of making nanoparticles with various sizes, shapes & compositions.
Controlled optical property of colloidal TiO2 nanoparticles
Paper coming soon!
TiO2, a semiconductor material which usually exhibits white color under visible light due to its rather wide bandgap, shows unique & controllable visible light optical property as well as photo-luminescense under visible light.
Plasma processing of colloidal nanoparticle assembly
Although ligands play important role in colloidal nanoparticle synthesis, it hinders the contact between the particle and the substance that it would interact with. Compared to other ligand-removal methods, plasma is effective in removing ligands from nanoparticle thin film as well as modifying the surface of mesoporous structures.
Charaterizations of nanoparticles/thin film
TEM is powerful in checking nanoparticle morphology.
SEM could be applied in checking the thin film thickness.
We utilize XRD to determine crystal phase and calculate crystalline size.
IBA is powerful in analyzing element distribution throughout the thin film material.
XPS is a surface sensitive but reliable technique for analyzing chemical environment of a certain element.
Raman could see the C-H stretching which belongs to the organic ligand long chain.
In our study UV-vis is applied to check the thin film material absorbance of light.
EPR could detect defect states base on uncoupled electronic spins.
FTIR could see the polar binding of elements in a material thus some special groups that are generally hard to be detected.
AWARDS & HOBBIES
2019
2017
2013,14
2012
Professional Advancement Grant awarded by Graduate and Professional Student Senate
Best Poster Award, MRS Fall, Boston
MRS Meeting Travel Sponsorship
First-class Outstanding Student Scholarship
National English Contest First Price
Enjoy sports, music, reading physics and philosophy. Curious about EVERYTHING.