许同学哥伦比亚大学电子工程硕士

学员背景

• GPA：3.9 | 4分制
• 标化成绩：TOEFL:93、GRE:321
• 背景提升：如何提升背景？
• 主要经历：
  
  
  学术研究经历：
  Patterned Graphene Based on Self-Assembled Microsphere 04/2019- 10/2019
  Characterize different two-dimensional materials with different layers by using Raman spectroscopy.
  Prepared graphene samples and BN samples by mechanical exfoliation and used dry-transfer to obtain the van der Waals heterostructure and check the samples with SEM.
  Created pattern on the graphene and encapsulated it with hBN (hexagonal Boron Nitride) and used E-beam lithography to add electrodes to create devices which used as sensor for gas-sensing.
  Investigated the Moiré superlattice with the engineered band structure created by patterned graphene.
  Electronic Structures and Elastic Properties of Perovskites 06/2017- 10/2018
  Used Diamond to draw the crystal structure of perovskite, learned Density Functional Theory (DFT), and used MATLAB to compute the elastic properties of a novel perovskite which was claimed to possess outstanding piezoelectric effect by previous publications.
  Helped synthesize the 1D helical coordination polymers to successfully achieve resolution of chiral nitrogen atom.
  Helped synthesize chemicals and conducted x-ray diffraction measurement of the chemical structures, and used DFT to obtain its microstructure under high pressure.
  Nano-devices Made by Two-dimensional Materials 07/2018- 02/2019
  Took Hammers approach to synthesize graphene oxide, blended it with cellulose to create graphene oxide aerogels, which has excellent electric conductivity.
  Combined the graphene oxide aerogels and RFID electronic tag to propose a device for pressure detection in building constructions.
  
  出版物：
  Publications
  Resolution of chiral nitrogen atoms in 1D helical coordination polymers. Guoqiang Feng, Haoxiang Xu, Wei Li, Jie Zhang, Inorganic Chemistry Communications 96 (2018) 81-85.
  Electronic structures and elastic properties of a family of metal-free perovskites. Kai Li, Liyuan Dong, Haoxiang Xu, Yan Qin, Zhigang Li, Muhammad Azeem, Wei Li, Xianhe Bu, Material Chemistry Frontiers, 2019, 3, 1678.