Các hướng nghiên cứu chính của Bộ môn Vật liệu Nano và Màng mỏng

Chủ nhật - 07/04/2019 07:25
                                                                                     RESEARCH FIELDS
NANOMATERIALS FOR ENVIRONMENTAL TREATMENT,  AGRICULTURE AND SENSORS
1. Nanomaterials for environmental treatment field
Contact: Pham Van Viet, PhD, Email: pvviet@hcmus.edu.vn
Abstract: The research direction of our group is focused on the synthesis of nanomaterials to apply the polluted environmental treatment, including:
  • Photocatalytic reaction (heterojunction, Z-scheme, etc.) for environmental treatment (polluteddye organics, nitrogen oxide)
  • Photocatalytic reaction for energy conservationsuch as hydrogen/oxygen evolution reaction, CO2reduction, etc.
  • Synthesis of nanomaterials such as Ag, Pt, Au, Pd,Cu (nanosphere, nanotriangle); ZnO, TiO2, SnO2(nanoparticle, nanorod, nanotube), etc.

Figure 1. NO photocatalytic degradation mechanism of the SnO2/TNTs heterojunction [Chemosphere (2019) 215, 323-332]

Figure 2. Synthesis of silver nanoparticles by an improved green synthesis method [J PhotochemPhotobiol B (2018), 182, 108-114]

Selected Publications:

1. Tran Hong Huy, Bui Dai Phat, Fei Kang, Ya-Fen Wang, Shou-Heng Liu, Sheng-Jie You, Gen-Mu Chang, Cao Minh Thi, Pham Van Viet*, SnO2/TiO2 nanotube heterojunction: The firstinvestigation of NO degradation by visible light-driven photocatalysis, Chemosphere (2019)215, 323-332
2. Tran Hong Huy, Bui Dai Phat, Cao Minh Thi, Pham Van Viet*, High photocatalytic removal ofNO gas over SnO2 nanoparticles under solar light, Environmental Chemistry Letters (Firstonline) https://doi.org/10.1007/s10311-018-0801-0
3. Bui Dai Phat, Tran Hong Huy, Fei Kang, Ya-Fen Wang, Sheng-Jie You, Cao Minh Thi, VuHoang Nam, Pham Van Viet*, Insight into the Photocatalytic Mechanism of Tin
Dioxide/Polyaniline Nanocomposites for NO Degradation under Solar Light, ACS Applied
Nano Materials 2018, 1, 10, 5786-5794
4. Pham Van Viet*, Truong Tan Sang, Nguyen Ho Bich Ngoc, Cao Minh Thi, An Improved GreenSynthesis Method and Escherichia coli Antibacterial Activity of Silver Nanoparticles, Journalof Photochemistry and Photobiology B Biology (2018), 182, 108-114
5. Pham Van Viet*, Bui Dai Phat, Tran Hong Huy, Cao Minh Thi, Nguyen Tri Khoa, YongsooKim*, Le Van Hieu, Photoreduction Route for Cu2O/TiO2 Nanotubes Junction for EnhancedPhotocatalytic Activity, RSC Advances (2018) 8, 12420-12427
6. Pham Van Viet*, Tran Hong Huy, Nguyen Xuan Sang, Cao Minh Thi and Le Van Hieu, One-step hydrothermal synthesis and characterization of SnO2 nanoparticle-loaded TiO2
nanotubes with high photocatalytic performance under sunlight, Journal of Materials Science,(2018), 53(5),3364–3374
7. Pham Van Viet*, Bach Thang Phan, Derrick Mott, Shinya Maenosono, Truong Tan Sang, CaoMinh Thi, and Le Van Hieu, Silver Nanoparticle Loaded TiO2 Nanotubes with HighPhotocatalytic and Antibacterial Activity Synthesized by Photoreduction Method, Journal ofPhotochemistry and Photobiology A Chemistry, (2018), 352, 106-112


2. Nanomaterials for agricultural application
Contact: Tran Cong Khanh, PhD, Email: tckhanh@hcmus.edu.vn
  • Synthesis of insecticidal nanoformulations, such as emamectin benzoate nanoformulations.
  • Synthesis and studying the structure of nanocomposites Ag/SiO2, Cu/SiO2

Figure 1.  Inhibition zone of samples against E. coli: a) AgNO3 1mM; b) T.asperellum; c, d) distilled water; e) “biosynthesis” Ag NPs; f) “chemical reduction” Ag NPs.

Selected Publications:
  1. Nguyen Phuc Quan, Tran Quoc Vinh, Kieu Thi My Yen, Le Vu Khanh Trang, Nguyen Minh Ly, Tran Cong Khanh, Comparison of the antibacterial activity against Escherichia coli of silver nanoparticle produced by chemical synthesis with biosynthesis, Materials Science: Materials Review, V.2, Issue 2, 2018, P.1-8.


3. ZnO nanostructure for biosensor application
Contact: La Phan Phuong Ha, MS, Email: lppha@hcmus.edu.vn
  • 1D structural ZnO nanomaterial has good characterictics such as high electric transmittance, nontoxic, high biological compatibility, high isoelectric point (IP 9.5), so that they could be applied in biosensor.


                                                           
Figure 1. The CV curve of (a) the pure ZnO nanorods and (b) the immobilized ZnO nanorods in 200 mM galactose solution

Selected Publications:

1. La Phan Phương Ha, Ngo Van Chi Quang and Tran Quang Trung, The Process of Immobilization of ZnO Nanorods Surface with Galactose Oxidase, Journal of Pharmacy and Pharmacology 5 (2017) 766-770
2. La Phan Phương Hạ, Nguyễn Thị Thu Hiền, Trần Quang Trung, Cảm biến sinh học galactose trên nền vật liệu nano ZnO, Tạp chí Phát triển Khoa HọcCông nghệ, tập 20, số tháng 4, 2017


 
NANOMATERIALS FOR OPTOELCTRONIC,  MEMORY DEVICES AND ENERGY CONVERSION
4. Optoelectronic devices
Contact: Dang Vinh Quang, PhD, Email: dvquang@hcmus.edu.vn
Abstract: Basic researches on optoelectronic materials and their potential application such as develop and characterize the physical properties of optoelectronic materials, enable fabrication and characterization of optoelectronic devices (photodetectors, solar cells, OLED…)
  • Optimization of optoelectronic materials for shifting the absorption toward the visible region (doping, decorating…)
  • Development of device structures to enhancement the visible absorption (hybrid, patterning…)
  • Investigation of optoelectronic devices’ performance
  • Study of the sensing mechanism
  • Development of the stretchable, flexible devices
 

Figure 1. Stretchable photodetector [ACS Appl. Mater. Interfaces, 2017, 9 (41), pp 35958–35967]
                                            
Figure 2. Device structure and energy diagram of solar cell based on nanohybrid perovskite [Organic Electronics 50 (2017) 247e254]

Selected Publications:
  1. Vinh Quang Dang, Minseop Byun, Junjie Kang, Chaehyun Kim, Pil-Hoon Jung, Yang-Doo Kim, Nae-Eung Lee, and Heon Lee. Low temperature fabrication of hybrid solar cells using co-sensiti zer of perovskite and lead sulfi de nanoparticles, Organic Electronics, 50, 247-254, 2017.
  2. Vinh Quang Dang, Tran Quang Trung, Han-Byeol Lee, Do-Il Kim, Sungjin Moon, Nae-Eung Lee, and Hoen Lee. An Omnidirectionally Stretchable Photodetector Based on Organic–Inorganic Heterojunctions, ACS Appl. Mater. Interfaces, 9 (41), 35958-35967, 2017.
  3. Vinh Quang Dang, Gill-Sang Han, Tran Quang Trung, Le Thai Duy, Young-Un Jin, Byeong-Ung Hwang, Hyun-Suk Jung, and Nae-Eung Lee. Methylammonium lead iodide perovskite-graphene hybrid channels in flexible broadband phototransistors, Carbon, 105, 353-361, 2016.
  4. Le Thai Duy, Tran Quang Trung, Vinh Quang Dang, Byeong-Ung Hwang, Saqib Siddiqui, Il-Yung Son, Seung Kyun Yoon, Dong June Chung, Nae-Eung Lee. Flexible Transparent Reduced Graphene Oxide Sensor Coupled with Organic Dye Molecules for Rapid Dual-Mode Ammonia Gas Detection, Advanced Functional Materials¸ 26 (24), 4329-4338, 2016
  5. Junjie Kang, Vinh Quang Dang, Hongjian Li, Sungjin Moon, Panpan Li, Yangdoo Kim, Chaehyun Kim, Hakjong Choi, Zhiqiang Liu, and Heon Lee. InGaN-based photoanode with ZnO nanowires for water splitting, Nano Convergence, 3:34, 2016.
  6. Junjie Kang, Vinh Quang Dang, Hongjian Li, Sungjin Moon, Panpan Li, Yangdoo Kim, Chaehyun Kim, Jinyoung Choi, Hakjong Choi, Zhiqiang Liu, and Heon Lee. Broadband light-absorption InGaN photoanode assisted by imprint patterning and ZnO nanowire growth for energy conversion, Nanotechnology, 28 (4), 045401, 2017.
  7. Vinh Quang Dang , Tran Quang Trung , Do-Il Kim , Le Thai Duy , Byeong-Ung Hwang , Doo-Won Lee , Bo-Yeong Kim , Le Duc Toan, and Nae-Eung Lee. Ultrahigh Responsivity in Graphene–ZnO Nanorod Hybrid UV Photodetector, Small, 11 (25), 3054-3065, 2015.
  8. Vinh Quang Dang, Tran Quang Trung, Le Thai Duy, Bo-Yeong Kim, Saqib Siddiqui, Wonil Lee, and Nae-Eung Lee. High Performance Flexible UV Phototransistor Using Hybrid Channel of Vertical ZnO Nanorods and Graphene, ACS Appl. Mater. Interfaces, 7 (20), 11032-11040, 2015.
  9. Le Thai Duy, Duck-Jin Kim, Tran Quang Trung, Vinh Quang Dang, Bo-Yeong Kim, Hock Key Moon, Nae-Eung Lee. High Performance Three-Dimensional Chemical Sensor Platform Using Reduced Graphene Oxide Formed on High Aspect-Ratio Micro-Pillars, Adv. Funct. Mater., 25, 883-890, 2015.
  10. Vinh Quang Dang, Do-Il Kim, Le Thai Duy, Bo-Yeong Kim, Byeong-Ung Hwang, Mi Jang, Kyung-Sik Shin, Sang-Woo Kim and Nae-Eung Lee. Piezoelectric coupling in a field-effect transistor with a nanohybrid channel of ZnO nanorods grown vertically on graphene. Nanoscale, 2014.


5. Synthesis and studying the structure of semiconductor materials for optoelectronics
Contact: Tran Cong Khanh, PhD, Email: tckhanh@hcmus.edu.vn

Selected Publications:

1. Tuan V. Vu, A. A. Lavrentyev, Doan V. Thuan, Chuong V. Nguyen, O. Y. Khyzhun, B. V. Gabrelian, Khanh C. Tran, Hai L. Luong, Pham D. Tung, Khang D. Pham, Phuc Toan Dang, Dat D. Vo, Electronic properties and optical behaviors of bulk and monolayer ZrS2: A theoretical investigation, Superlattices and Microstructures, V. 125, 2019, P.205-213.
3. Tran Khanh, Elena Mozhevitina, Andrew Khomyakov, Roman Avetisov, Albert Daydov, Vladimir Chegnov, Vladimir Antonov, Svetlana Kobeleva, Nikolai Zhavoronkov, Igor Avetissov, Nonstoichiometry and luminescent properties of ZnSe crystals grown from the melt at high pressures, Journal of Crystal Growth, V.457, 2017, P. 331–336.
4. Khanh Cong Tran, E. N. Mozhevitina, K. A. Potapova, B. N. Levonovich, and I. Ch. Avetissov, Selenium Solubility in Solid Zinc Selenide, Inorganic Materials, Vol. 52, No. 7, 2016, P. 643–649.
5. I. Avetissov, Tran Khanh, R. Saifutyarov, E. Mozhevitina, A.Khomyakov, R. Avetisov, A. Davydov, S. Neustroev, N. Zhavoronkov, Nonstoichiometry problems of ZnSe: From single crystals to nanofilms, Thin Solid Films, V. 613, 2016, P. 11-18.
6. I. Avetissov, E. Mozhevitina, A. Khomyakov, Tran Khanh, Universal approach for nonstoichiometry determination in binary chemical compounds, Cryst. Res. Technol., V. 50, № 1, 2015, P. 93-100.


6. Nanomaterials and thin films for data storage
Contact: Pham Kim Ngoc, PhD, Email: phamkngoc@hcmus.edu.vn
 Abstract: Research focused on nanostructured  materials (organic, inorganic and hybrid nanocomposite) for resistance random access memory devices (memristors). The ideal characteristics of memristors such as simple structure, fast programming, nonvolatile, low power consumption, high density integration and low fabrication cost lead them high potential in data storage field.
  • Synthesis of nanomaterials and fabrication of capacitor – like memory devices.
  • Investigation of resistive switching effect and memristors’ performance
  • Study of the electrical transport and resistive switching mechanisms
  • Development of the stretchable, flexible memristors.

Figure 1. (a) Schematic diagram of the device used for C-AFM measurements. (b)  Local I–V hysteresis curve obtained by C-AFM at a compliance current of 10 nA [Journal of Electronic Materials, 44, 10, 3395 (2015)]

Figure 2. The resistive switching mechanism of memory device based on TiO2 nanotube and polyvinyl alcohol (PVA) [Journal of Materials Chemistry C, 6,1971(2018)]

Selected Publications:
  1. Ngoc Kim Pham, Nam Hoang Vu, Viet Van Pham, Hanh Kieu Thi Ta, Thi Minh Cao, Nam Thoai and Vinh Cao Tran, Comprehensive resistive switching behavior of hybrid polyvinyl alcohol and TiO2 nanotube nanocomposites identified by combining experimental and density functional theory studies, Journal of Materials Chemistry C, 6,1971(2018)
  2. Ngoc Kim Pham, Kieu Hanh Thi Ta, Vinh Cao Tran, Van Hieu Le, Bao Thu Le Nguyen, HeongKyu Ju, Tosawat Seetawan and Bach Thang Phan, Effect of post–annealing processes on filamentary–based resistive switching mechanism of chromium oxide thin films, Journal of Electronic Materials, 46, 3285 (2017)
  3. Kim Ngoc Pham, Minsu Choi, Cao Vinh Tran, Trung Do Nguyen, Van Hieu Le, Taekjib Choi, Jaichan Lee, and Bach Thang Phan, Study of the Resistive Switching Effect in Chromium Oxide Thin Films by Use of Conductive Atomic Force Microscopy, Journal of Electronic Materials, 44, 10, 3395 (2015).
  4. Thi Bang Tam Dao, Kim Ngoc Pham, Yi-Lung Cheng, Sang Sub Kim, Bach Thang Phan, Correlation between crystallinity and resistive switching behavior of sputtered WO3 thin films, Current Applied Physics, 14, 1707-1712 (2014)
  5. Kim Ngoc Pham, Trung Do Nguyen, Thi Bang Tam Dao, Thi Kieu Hanh Ta, Vinh Cao Tran, Van Hieu Nguyen, Sang Sub Kim, Shinya Maenosono and Bach Thang Phan, Different Directions of Switching of Chromium Oxide Thin Films, Journal of Electronic Materials, 43, 7, 2747-2753 (2014).


7. Nanostructured materials for advanced energy conversion and storage devices
Contact: Tran Duy Tap, PhD, Email: tdtap@hcmus.edu.vn
  • Modify the advanced materials using radiation technology for advanced energy conversion and storage devices
  • Methods: Small angle X-ray / neutron scattering (SAXS/SANS), Positron annihilation spectroscopy (PAS)
 


Selected Publications:
  1. Tran Duy Tap, La Ly Nguyen, Yue Zhao, Shin Hasegawa, Shin-ichi Sawada, Nguyen Quang Hung, Luu Anh Tuyen, Yasunari Maekawa, SAXS investigation on morphological change in lamellar phases during propagation steps of graft-type polymer electrolyte membranes for fuel cell applications, Macromolecules, 2019, Submitted.
  2. Tran Duy Tap, Shin-ichi Sawada, Shin Hasegawa, Kimio Yoshimura, Yojiro Oba, Masato Ohnuma, Yosuke Katsumura, Yasunari Maekawa, Hierachical structure-property relationships in graft-type fluorinated polymer electrolyte membranes using small- and ultrasmall-angle X-ray scattering analysis, Macromolecules, 47, 2373-2383, 2014.
  3. Tran Duy Tap, Shin-ichi Sawada, Shin Hasegawa, Yosuke Katsumura, and Yasunari Maekawa, Poly(ethylene-co -tetrafluoroethylene) (ETFE)-based graft-type polymer electrolyte membranes with different ion exchange capacitieswith various IEC: Relative humidity dependence for fuel cell applications, Journal of Membrane Science, 447, 19-25, 2013.
 
MODELLING OF STRUCTURE AND PROPERTIES OF NANOMATERIALS
8. Modelling of properties and devices based on materials at the atomic scale
Contact: Vu Hoang Nam,  Email: vhnam@hcmus.edu.vn
Density functional theory calculations for atomic and electronic structures of 1D/2D/3D materials interfaces

Figure 1. Atomic model of the most stable surface structure of TiO2(101) anatase and PVA monomer (a) side-view and (b) top-view.

Selected Publications:
 
  1. Nam H Vu, Hieu V Le, Thi M Cao, Viet V Pham, Hung M Le and Duc Nguyen-Manh, Anatase–rutile phase transformation of titanium dioxide bulk material: a DFT + U approach, J. Phys.: Condens. Matter, 24, 405501 (2012)
  2. Ngoc Kim PhamNam Hoang Vu,  Viet Van PhamHanh Kieu Thi TaThi Minh CaoNam Thoai  and  Vinh Cao Tran., Comprehensive resistive switching behavior of hybrid polyvinyl alcohol and TiO2 nanotube nanocomposites from combining experimental and density functional theory studies., J. Mater. Chem. C, 6, 1971 (2018)
  3. Bui Dai Phat, Tran Hong Huy, Fei Kang, Ya-Fen Wang, Sheng-Jie You, Cao Minh Thi, Vu Hoang Nam, Pham Van Viet, Insight into the Photocatalytic Mechanism of Tin Dioxide/Polyaniline Nanocomposites for NO Degradation under Solar Light, ACS Applied Nano Materials, 1, 10, 5786 (2018)



9. Modelling the aggregation of Protein and Protein folding
Contact: Tran Thi Minh Thu,  Email: ttmthu@hcmus.edu.vn
Since protein aggregation can cause a number of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease etc., understanding of the key factors that govern the protein propensity to aggregation is of primary interest. Our research concentrate on:
 
  • How mutation effect to the folding behavior of protein
  • The intrinsic factors effect to the aggregation rate of protein
  • Enhance sampling and drug design
                                                     
Figure 1. (a) Initial structure of protein in wild type and its mutation. (b) Different in morphology of fibril state and free energy landscape of protein in wild type and its mutant.

Selected Publications:
  1. Nguyen Hoang Linh, Tran Thi Minh Thu, Phan Minh Truong, Pham Dang Lan, Man Hoang Viet, Phuong H. Nguyen, T. Ly Anh, Y-C Chen, and Mai Suan Li, Aβ41 Aggregates More Like Aβ40 Than Like Aβ42: In silico and in vitro Study", The Journal of Physical Chemistry B, vol. 120, no. 30, pp. 7371-7379, 2016.
  2. Nguyen Hoang Linh, Tran Thi Minh Thu, Ly Anh Tu, C-K Hu, and Mai Suan Li, Impact of mutations at C-terminus on structures and dynamics of Aβ40 and Aβ42: Molecular simulation study, The Journal of Physical Chemistry B, vol. 121, no. 17), pp.  4341-4354, 2017.
  3. Tran Thi Minh Thu, Nguyen Truong Co, Ly Anh Tu, and Mai Suan Li, Aggregation Rate of Amyloid Beta Peptide is Controlled by Beta-Content in Monomeric State, The Journal of Chemical Physics,  150, 225101 (2019)
  4. Tran Thi Minh Thu, Shu-Hsiang Huang, Ly Anh Tu, Shang-Ting Fang,  Mai Suan Li, Yi-Cheng Chen, G37V mutation of Aβ42 induces a nontoxic oligomer-like aggregate: an in vitro and in silico study, Neurochemistry International 129, 104512 (2019)

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