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Khoa Vật lý trân trọng kính mời quý vị đến dự seminar tháng 10/2018
Ngày: 05/10/2018 (Thứ 6)
Giờ: từ 9 giờ 00 sáng đến 10 giờ 00 sáng
Địa điểm: Phòng 408F, nhà T1, Đại học Khoa học Tự nhiên334Nguyễn Trãi
Speaker: Dr. DINH VAN AN (JICA long-term Expert at Nanotechnology Program, Vietnam Japan University, VNU; Graduate School of Engineering, Osaka University, Japan)


Abstract: In this talk I will introduce two research directions of my group:

1. Material design for rechargeable ion batteries: Using the density functional calculations, we investigated the crystal and electronic structures, electrochemical properties and ion diffusion mechanism of several materials used for cathode and anode of Li/Na ion batteries. The diffusion of Li+/Na+ ion which is accompanied by a positive small polaron is described by three elementary diffusion processes, including single, crossing and parallel diffusions [1]. Diffusion barrier and pathway are explored by NEB method.

2. Material design towards the early detection of lung cancer: Every year, the large number of death due to lung cancer is reported. 5 years after diagnosis, there are only 14% of the lung cancer patients are alive. Screening tests to detect lung cancer at an early stage is very important for localizing the cancer cells and significantly improving the possibility of the curability of the disease. Breath contains clinically useful markers such as the violate organic compounds (VOCs), which can be detected by electronic sensors. In this seminar, I will introduce briefly the quantum simulation methods in searching the 2-dementional materials for the sensitive devices that can be used in detecting the lung cancer at early stage.

1. V. A. Dinh, J. Nara and T. Ohno, A new insight into the polaron-Li complex diffusion in cathode material LiFe1-yMnyPO4 for Li ion batteries, Appl. Phys. Express 5(2012) 045801.

2. K. M. Bui, V. A. Dinh, and T. Ohno, Diffusion of polaron-Li complex in lithium silicate Li2FeSiO4, Appl. Phys. Express 12 (2012) 125802.

3. D. M. Duong, V. A. Dinh and T. Ohno, Quasi-3D diffusion of Li ions in carbonophosphate Li2Fe(PO4)3CO3. Appl. Phys. Express 6 (2013) 115801.

4. K. M. Bui, V. A. Dinh, S. Okada and T. Ohno, Hybrid functional study of the NASICON-type Na3V2(PO4)3: Crystal and electronic structures, and polaron-Na vacancy complex diffusion. Phys. Chem. Chem. Phys. 17 (2015) 30433.

5. K. M. Bui, V. A. Dinh, S. Okada and T. Ohno, Diffusion in NASICON-type electrolyte material NZSP for all-solid-state batteries: Density functional study. Phys. Chem. Chem. Phys. 18 (2016) 27226.

6. M. Debbichi, L. Debbichi, V. A. Dinh and S. Lebègue, First principles study of the crystal, electronic structure, and diffusion mechanism of polaron-Na vacancy of Na3MnPO4CO3 for Na-ion battery applications. J. Phys. D: Appl. Phys. 50 (2017) 045502.

7. H. D. Luong, Y. Morikawa, Y. Shibutani and V. A. Dinh, Difusion mechanism of Na ion – polaron complex in potential cathode in potential cathode materials NaVOPO4 and VOPO4 of rechargeable sodium-ion batteries. Phys. Chem. Chem. Phys. 20 (2018) 23625      

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