Jong-Guk Ahn

I double-majored in Physics and Chemistry, and I keep trying to explain my knowledge easily for other person. I figured out the essentials of physics are not a lot of beautiful principles, but problem identification and logical thinking. So, I constantly seek out issues in my surrondings and strive to make it better.

Currently, I've been studying various properties of two-dimensional materials by denstiy functional theory (DFT) calculation with Linux-based parallel computing (UoU Arachi & RIKEN Hokusai). Also, I studied surface-enhanced Raman spectroscopy (SERS) using nano-scale sized materials such as hexagonal boron nitride (h-BN) and Au nanoparticles. I hope to adopt machine learning near future with my domain knowledge. (Lab. homapage )

I'm not only interested in science, I love many things, like design, performing magic, coding, cooking, editing video, playing the guitar. If you have any questions or your story, feel free to send e-mail (jongguk.ahn@gmail.com). Never mind any subject!


Educations

Research Experience

Research Topic: Density Functional Theory (DFT) Calculation, Surface Enhanced Raman Spectroscopy (SERS) with 2D materials.

Paper Publication

[9] Jong-Guk Ahn, Jee Hyeon Kim, Minhui Lee, Yousoo Kim, Jaehoon Jung, Hyunseob Lim, "Anomalous One-Dimensional Quantum Confinement Effect in Graphene Nanowrinkle"
Phys. Rev. B 2023, 108, 045412.


[8] Younghee Park, Chaehyeon Ahn, Jong-Guk Ahn, Jee Hyeon Kim, Jaehoon Jung, Juseung Oh, Sunmin Ryu, Soyoung Kim, Seung Cheol Kim, Taewoong Kim, Hyunseob Lim, "Critical Role of Surface Termination of Sapphire Substrates in Crystallographic Epitaxial Growth of MoS2 Using Inorganic Molecular Precursors"
ACS Nano 2023, 17, 1196.


[7] Jihong Kim, Sung Min Wi, Jong-Guk Ahn, Sangjun Son, HeeYoung Lim, Yeonsu Park, Hye Ji Eun, Jong Bae Park, Hyunseob Lim, Sangyeon Pak, A-Rang Jang, Young-Woo Lee, "Engineering Geometric Electrodes for Electric Field-Enhanced High-Performance Flexible In-Plane Micro-Supercapacitors"
Energy Environ. Mater. 2023, 6, e12581.


[6] Jee Hyeon Kim, Chaehyeon Ahn, Jong-Guk Ahn, Younghee Park, Soyoung Kim, Daehyun Kim, Jaeyoon Baik, Jaehoon Jung, Hyunseob Lim, "Vapor Pressure-Controllable Molecular Inorganic Precursors for Growth of Monolayer WS2: Influence of Precursor-Substrate Interaction on Growth Thermodynamics"
Appl. Surf. Sci. 2022, 587, 152829.


[5] Jong-Guk Ahn, Gyeonghun Yeo, Yeji Han, Younghee Park, Jong Wook Hong, Hyunseob Lim, "Sustainable Surface-Enhanced Raman Substrate with Hexagonal Boron Nitride Dielectric Spacer for Preventing Electric Field Cancellation at Au–Au Nanogap"
ACS Appl. Mater. Interfaces 2021, 13, 42176-42182.


[4] Chaehyeon Ahn, Younghee Park, Seunghyun Shin, Jong-Guk Ahn, Intek Song, Youngjoon An, Jaehoon Jung, Chung Soo Kim, Jee Hyeon Kim, Jiwon Bang, Daehyun Kim, Jaeyoon Baik, Hyunseob Lim, "Growth of Monolayer and Multilayer MoS2 Films by Selection of Growth Mode: Two Pathways via Chemisorption and Physisorption of an Inorganic Molecular Precursor"
ACS Appl. Mater. Interfaces 2021, 13, 6805-6812.


[3] Younghee Park, Seunghyun Shin, Youngjoon An, Jong-Guk Ahn, Geumbi Shin, Chaehyeon Ahn, Jiwon Bang, Jaeyoon Baik, Yousoo Kim, Jaehoon Jung, Hyunseob Lim, "Tunable Optical Transition in 2H-MoS2 via Direct Electrochemical Engineering of Vacancy Defects and Surface S–C Bonds"
ACS Appl. Mater. Interfaces 2020, 12, 40870-40878.


[2] Hyunseob Lim, Younghee Park, Minhui Lee, Jong-Guk Ahn, Bao Wen Li, Da Luo, Jaehoon Jung, Rodney S. Ruoff, Yousoo Kim, "Centimeter-Scale and Highly Crystalline 2D Alcohol: Evidence for Graphenol (C6OH)"
Nano Lett. 2020, 20, 2107-2112.


[1] Jong-Guk Ahn§, Jiwon Bang§, Jaehoon Jung, Yousoo Kim, Hyunseob Lim, "Scanning Tunneling Microscopic Investigations for Studying Conformational Change of Underlying Cu(111) and Ni(111) during Graphene Growth"
Surf. Sci. 2020, 693, 121526. (§These authors are equally contributed)

This paper was selected as the cover paper of Vol. 693.