Article
Chemistry, Analytical
Masafumi Inaba, Takenori Oda, Masaki Kono, Nisarut Phansiri, Takahiro Morita, Shota Nakahara, Michihiko Nakano, Junya Suehiro
Summary: The study fabricated CNT/SnO2 heterojunction gas sensors using one-step dielectrophoretic assembly and investigated the effect of CNT/SnO2 ratio on gas detection properties. The results showed that the UV-irradiated CNT/SnO2 heterojunction gas sensor had a high response to 1 ppm NO2 in artificial air.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Shulong Chang, Mengya Yang, Rui Pang, Li Ye, Xinchang Wang, Anyuan Cao, Yuanyuan Shang
Summary: The carbon nanotube-anatase titanium dioxide (CNT/a-TiO2) film sensor exhibits good sensitivity, fast response, reversibility, and high selectivity towards toxic gases. Its lightweight and high-performance characteristics make it a promising candidate for future wearable electronics and gas monitoring devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Peng Wang, Tong Song, Guanggang Gao, Katarzyna Matras-Postolek, Ping Yang
Summary: In this study, SnO2 clusters embedded in TiO2 nanosheets were synthesized via a solvothermal method. The gas sensing performance of the resulting heterostructures was significantly enhanced, especially towards acetone, ethanol, and triethylamine, with a response time as short as 10 seconds.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Abulkosim Nasriddinov, Vadim Platonov, Alexey Garshev, Marina Rumyantseva
Summary: In this study, the effectiveness of decoration of nanocrystalline SnO2/TiO2 composites with Au NPs and Pt NPs in enhancing gas sensor properties in low-temperature HCHO detection was analyzed. It was found that Au NPs and Pt NPs could enhance sensor responses at different temperatures, with chemical and electronic sensitization mechanisms explaining their effects on the sensor response towards HCHO.
Article
Chemistry, Analytical
Ang Li, Sikai Zhao, Jinzhou Bai, Shuling Gao, Dezhou Wei, Yanbai Shen, Zhenyu Yuan, Fanli Meng
Summary: By synthesizing SnO2@TiO2 nanorods, the sensing performance of titanium dioxide nanorods has been improved, exhibiting high response and stability towards hydrogen gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Long Chen, Haozhou Shi, Chenjia Ye, Xiaoyu Xia, Yi Li, Chenying Pan, Yanhua Song, Jun Liu, Hao Dong, Di Wang, Xing Chen
Summary: Au decorated In-doped SnO2 porous nanotubes were fabricated and showed good ethanol sensing properties. The 3% mol Au decorated In-doped SnO2 porous nanotubes had high response to ethanol and could detect ethanol down to 50 ppb at a low working temperature of 150 degrees C. The gas sensor also demonstrated high selectivity, reversibility, and long-term stability, attributed to factors such as oxygen vacancies, catalytic activity of Au nanocatalysts, and porous structures.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Sungjin Kim, Deok-Hyun Cho, Hyeon-Kyung Chang, Ho-Nyun Lee, Hyun-Jong Kim, Tae Joo Park, Young Min Park
Summary: In this study, a controlled porous structure for photoactive gas sensors was fabricated using gas-flow thermal evaporation and atomic layer deposition method. By adjusting the pressure during thermal evaporation and depositing TiO2 layers on the surface of SnO2, selective response to specific gases was achieved. The experimental results showed that the nanoporous SnO2 exhibited high response rate and low detection limit, and the addition of TiO2 layer significantly improved the selective response to HCHO.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Myung Sik Choi, Han Gil Na, Jae Hoon Bang, Ali Mirzaei, Seungmin Han, Ha Young Lee, Sang Sub Kim, Hyoun Woo Kim, Changhyun Jin
Summary: Gas sensors were fabricated by decorating amorphous carbon layers on SnO2 nanowires, without the need for pretreatment or functionalization, and operated at room temperature. The amorphous carbon increased surface area and improved NO(2) gas sensing by providing electronic effects to the SnO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Environmental
Icell Sharafeldin, Sara Garcia-Rios, Nashaat Ahmed, Miriam Alvarado, Xavier Vilanova, Nageh K. Allam
Summary: A toxic gas detector based on an array of metal-decorated multiwalled carbon nanotubes sensors was reported, with investigation on the sensors' response towards NO2, H2S, NH3, and CO gases. The experimental results demonstrated varied sensitivity and response of different metal-decorated MWCNTs sensors towards exposure to different toxic gases.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Qi Lu, Lingchu Huang, Xidong Hao, Weijia Li, Bin Wang, Tong Wang, Xishuang Liang, Fangmeng Liu, Chenguang Wang, Geyu Lu
Summary: The YSZ-based mixed potential type NH3 sensor has a promising application in on-board SCR systems due to its good thermal and chemical stability. By developing high-performance sensing electrode materials, the NH3 sensing performance of this sensor was significantly improved. The sensor modified with 20 mol.% NiO exhibited the highest response to 100 ppm NH3, with a low detection limit of 5 ppm, showing potential for in-situ ammonia monitoring in industrial and automotive applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Biochemistry & Molecular Biology
Shu-Yu Guo, Peng-Xiang Hou, Feng Zhang, Chang Liu, Hui-Ming Cheng
Summary: This review presents the potential of single-wall carbon nanotubes (SWCNTs) as candidate materials for flexible gas sensors. It introduces the sensing mechanism, structure parameters, design, fabrication, and performance of SWCNT-based gas sensors, and discusses the principles and possible approaches to further improve their performance.
Article
Chemistry, Physical
Xiaonan Wu, Youjin Gong, Bingjun Yang, Zhenghao Mao, Zhaotong Yan, Chen Su, Shunshun Xiong, Xinggui Long, Xiaolin Wang
Summary: The study focuses on the development of high-performance chemiresistive gas sensors at room temperature by combining MXene with SMO. The SnO2-TiO2-Ti3C2Tx heterostructure sensor exhibits excellent sensitivity, selectivity, and stability for NO2 detection. The improved sensing performance is attributed to the synergic effects of three phases, which form functionalized surfaces and multiple-type heterojunctions, resulting in enhanced electrical transduction function.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Wei Wei, Huanhuan Zhang, Tiyue Tao, Xiaohong Xia, Yuwen Bao, Manon Lourenco, Kevin Homewood, Zhongbing Huang, Yun Gao
Summary: In this work, a carbon monoxide sensor based on the CuO/TiO2 heterojunction was designed and fabricated. The sensor exhibits high sensitivity to CO at room temperature due to the good adsorption properties of CuO materials and the heterojunction interface charge transfer. The interference from H-2 is greatly reduced by optimizing the structure of the CuO/TiO2 heterojunction.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Analytical
Vo Thanh Duoc, Chu Manh Hung, Hugo Nguyen, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The grafted structures between SnO2 and ZnO nanowires were achieved through a two-step growth process, showing promising sensitivity for NO2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Bin Jiang, Tianqi Wang, Feng Li, Dan Li, Ying Yang, Hui Yu, Xiangting Dong
Summary: Researchers successfully constructed one-dimensional SnO2@PW12@TiO2 core-shell nanofibers with PW12/SnO2 and TiO2/PW12 heterogeneous interfaces. These nanofibers exhibited excellent performances in photocatalytic degradation and gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
M. T. Tran, Nguyen Tu, N. Quang, D. H. Nguyen, L. T. H. Thu, D. Q. Trung, P. T. Huy
Summary: Orange-red-emitting AlPO4:Eu3+ phosphors were synthesized by a co-precipitation method, exhibiting strong emissions under 394 nm excitation and maintaining stability at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Phan Hong Phuoc, Nguyen Ngoc Viet, Le Viet Thong, Chu Manh Hung, Nguyen Duc Hoa, Nguyen Van Duy, Hoang Si Hong, Nguyen Van Hieu
Summary: The study explored the gas-sensing performance of composite nanofibers with internal and external hetero-junctions of ZnO-SnO2, revealing enhanced response compared to mixed nanofibers. The gas-sensing mechanism of the hetero-nanojunctions was analyzed, attributing the remarkable gas sensing performance to the formation of internal heterojunctions.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Thao Dao Vu Phuong, Thuy-Linh Phi, Bui Huu Phi, Nguyen Van Hieu, Son Tang Nguyen, Tu Le Manh
Summary: This study provides a comprehensive investigation into the early stage of copper electrodeposition from a choline chloride-urea deep eutectic solvent (DES), revealing that copper deposition can be directly performed from a DES containing a small amount of water using a single potentiostatic step technique. Theoretical modeling confirms the mechanism of direct electronucleation of copper nanoparticles in the DES, and kinetic parameters play a crucial role in controlling the morphology and chemical composition of the obtained nanoparticles, as verified by surface characterization techniques.
JOURNAL OF NANOMATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Nguyen Manh Hung, Chu Manh Hung, Nguyen Van Duy, Nguyen Duc Hoa, Hoang Si Hong, Tran Khoa Dang, Nguyen Ngoc Viet, Le Viet Thong, Phan Hong Phuoc, Nguyen Van Hieu
Summary: A unique combination of nanojunction-networked SnO2 nanowires and pulsed UV-radiation shows high response gas sensors working at room temperature. The pulsed UV-radiation significantly enhances gas response and reduces response and recovery times. The enhancement of gas response is attributed to the photogeneration of electron-hole pairs.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
M. T. Tran, N. Du, N. Tu, N. T. Huyen, N. D. Hung, D. X. Viet, N. N. Ha, D. Q. Trung, P. T. Huy
Summary: This study successfully synthesized high-quality ZnS nanostructures, including nanorods, nanowires, and nanobelts. These nanostructures have a single phase with hexagonal structures and exhibit intense UV emissions at room temperature. Additionally, nanobelts and nanowires show sharp UV lasing-like peaks with high FWHM as narrow as 2-3 nm.
Article
Materials Science, Multidisciplinary
Chang-Ming Hung, Richa Pokharel Madhogaria, Baleeswaraiah Muchharla, Eleanor M. Clements, Anh Tuan Duong, Raja Das, Pham Thanh Huy, Sunglae Cho, Sarath Witanachchi, Hariharan Srikanth, Manh-Huong Phan
Summary: A new magneto-thermo-electric cooling device has been proposed, featuring a central magnetocaloric material sandwiched by thermoelectric materials, with the use of a ferromagnetic TE material enhancing heat exchange efficiency. MnP nanorod-structured films grown on Si substrates show promising magnetic, MC, and TE properties for MTECD applications, particularly in operating at high frequency. The combination of desirable magnetic, MC, and TE properties in MnP films allow for efficient cooling with enhanced magnetic flux density.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Analytical
Vo Thanh Duoc, Chu Manh Hung, Hugo Nguyen, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The grafted structures between SnO2 and ZnO nanowires were achieved through a two-step growth process, showing promising sensitivity for NO2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Minh T. Pham, Eric Amerling, Tu Anh Ngo, Hoang M. Luong, Kameron Hansen, Huy T Pham, Tuoc N Vu, Huan Tran, Luisa Whittaker-Brooks, Tho D. Nguyen
Summary: This study provides empirical evidence that strong circular dichroism and circularly polarized luminescence can occur even in nonchiral 2D Ruddlesden-Popper perovskites, shedding light on the mechanism behind these effects in metal halide perovskites. The researchers suggest that interlayer distortions in the inorganic layers at the organic/inorganic interface contribute to the strong Rashba-Dresselhaus splitting, which is estimated to be significant for potential spintronic applications. This work highlights the importance of understanding chiral transfer in perovskite materials for future developments in the field.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
D. Q. Trung, M. T. Tran, N. Tu, L. T. H. Thu, N. T. Huyen, N. D. Hung, D. X. Viet, N. D. T. Kien, P. T. Huy
Summary: In this study, ZnS/ZnO heterostructure-alloy hexagonal micropyramids were grown on Si/SiO2 wafers for the first time by thermal evaporation of ZnS powder. The results showed the coexistence of ZnS, ZnO, and ZnSO wurtzite phases in the as-received samples. By using high-spatial CL-FESEM, the CL spectra along different faces in a single micro-pyramid were measured in situ, revealing a red-shift of ZnS band-edge emission with increasing substrate temperature and the formation of a new emission band.
Article
Materials Science, Composites
Ha Thu Huong, Tran Thi Quynh Nhu, Ho Xuan Nang, Pham Anh Tuan, Pham Thanh Huy
Summary: In this work, TiO2-SiO2-x%Al2O3 nanocomposite thin films (NCTFs) with high purity, relatively homogeneity, high transmittance, excellent hardness, and crack-free were successfully synthesized by spin-coating technique. The transmittance and hardness of TiO2-SiO2-x%Al2O3 NCTFs were found to be strongly influenced by the Al2O3 content. The TiO2-SiO2-30%Al2O3 NCTF annealed at 500 degrees C in the air for 3 h exhibited the highest transmittance of 90.9% in the visible region, along with excellent hardness and scratch resistance.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Ceramics
Nguyen Minh Hieu, Cao Van Phuoc, Cao Viet Anh, Nguyen Manh Hung, Anh D. Phan, Nguyen Duc Chinh, Sutripto Majumder, Pham Thanh Huy, Jong- Ryul Jeong, Junghyo Nah, Dojin Kim
Summary: In this research, Bi2O3 nanoparticles/SWCNT nanohybrids were synthesized using a simple chemical procedure to construct a room temperature acetone gas sensor that can tolerate humidity. The morphological structure properties of the nanohybrids were analyzed using X-ray diffraction, transmission electron microscopy, and other surface area measurements. The effect of humidity was investigated through resistance and conductivity measurements, and the nanohybrids demonstrated a stable and linear response to acetone under increasing humidity conditions (0-90%), outperforming pure Bi2O3 and pure SWCNTs.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Ha Thu Huong, Tran Thi Quynh Nhu, Ho Xuan Nang, Pham Anh Tuan, Pham Thanh Huy
Summary: Super-hydrophilic TiO2-SiO2:x%Ce3+ nanocomposite thin films were fabricated and demonstrated to have a wide range of applications as a photovoltaic material, protective film for glasses, and other surfaces.
Article
Physics, Applied
M. T. Tran, D. Q. Trung, N. V. Du, N. Tu, N. M. Hieu, N. N. Ha, N. D. Hung, D. X. Viet, N. V. Quang, P. T. Huy
Summary: ZnS nanostructures with exceptional features, such as low lasing thresholds and easy fabrication, show great potential as gain media and optical waveguides. In this study, high-crystalline ZnS nanowires and nanobelts were synthesized using a thermal evaporation method, achieving remarkably low lasing thresholds and high-quality performances. The analysis of various techniques confirms the excellent quality of the synthesized nanostructures. The small full width at half maximum values and high-quality factors further highlight their great performance, making them prime candidates for ultraviolet photonic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Duy Hung Nguyen, Van Luong Pham, Van Huy Tran, Thi Kim Lien Nguyen, Van Tuan Pham, The Kien Pham, Xuan Viet Dao, Tu Nguyen, Thanh Huy Pham
Summary: Coating hydrophobic material on the surface of Mn4+ doped fluoride improves moisture resistance but reduces luminescent intensity. A special synthesis approach was used to enhance the optical properties and moisture resistance of K3AlF6:Mn4+ phosphor. The addition of KF (KKAFM) resulted in a 2.4 times higher luminescent intensity and 1.9 times better thermal stability compared to KAFM. The KKAFM phosphor displayed a higher internal quantum efficiency and better retention of emission value after immersion and exposure to high temperature and humidity.
Article
Engineering, Electrical & Electronic
Nguyen Thi Huyen, Nguyen Tu, Nguyen Van Quang, Do Quang Trung, Manh Trung Tran, Nguyen Van Du, Nguyen Duy Hung, Dao Xuan Viet, Nguyen Duc Trung Kien, Pham Thanh Huy
Summary: This study introduces a new red-emitting phosphor with excellent quantum efficiency and color purity, which can be widely excited to produce intense red emission, showing great potential for applications in plant growth LEDs and white light-emitting diodes.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Spyridon G. Kosionis, Emmanuel Paspalakis
Summary: In this study, we theoretically investigate the pump-probe response and the four-wave mixing spectrum in a hybrid system composed of a semiconductor quantum dot and a spherical metal nanoparticle. Using a density matrix methodology, we calculate the absorption/gain, dispersion, and four-wave mixing spectra, and analyze their spectral characteristics. We also apply the metastate theory and the dressed-state picture to predict the positions of the spectral resonances.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
L. S. Lima
Summary: This study investigates quantum correlation and entanglement in the non-Hermitian Hubbard model. By analyzing quantum entanglement measures such as entanglement negativity and entropy, the effect of non-Hermitian imaginary hopping on the system is explored. It is found that in the large... limit, the non-Hermiticity reverses the behavior of the ground state energy and low-lying excitations.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Nam-Chol Ri, Chung-Sim Kim, Sang-Ryol Ri, Su-Il Ri
Summary: By decreasing the lattice thermal conductivity of GNR through chemical derivation and strain, enhancing the thermoelectric properties of the electron part can be an important method to approach PGEC. This paper proposes synthesized hybrid systems formed by chemical derivation in the middle parts of b-AGNRs, and investigates the band structures and thermoelectric properties of the electron part under different strains. The results show that the band gaps of the systems significantly increase under different strains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Le T. T. Phuong, Tran Cong Phong
Summary: This study investigates the effects of gas molecules adsorbed on /312-borophene on its electronic heat capacity and thermal Schottky anomaly. The results show that the adsorbed gas molecules have different impacts on the electronic heat capacity, leading to the generation of various new energy levels.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Tianyan Jiang, Jie Fang, Wentao Zhang, Maoqiang Bi, Xi Chen, Junsheng Chen
Summary: This paper investigates the adsorption and sensing properties of transition metal-doped WSSe gas-sensitive devices towards H2, CO, and CO2 gases related to thermal runaway in Li-ion batteries using density functional theory. The results show that Ti, Mn, and Mo dopants preferentially bind to the S-surface of the WSSe monolayer, and all three monolayers exhibit significantly improved sensing characteristics, with chemisorption towards CO. Band structure analysis suggests that the Ti-WSSe monolayer has the potential to be used as a resistive CO detection sensor. Recovery time calculations indicate the reuse capabilities of the gas-sensitive devices. Mn-WSSe monolayer shows potential for H2 detection, while Mo-WSSe monolayer is more suitable for CO2 detection. This work lays the foundation for potential gas-sensitive applications of WSSe monolayer in thermal runaway scenarios, advancing research in gas sensing domains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Olga A. Alekseeva, Aleksandr A. Naberezhnov, Ekaterina Yu. Koroleva, Aleksandr Fokin
Summary: This study investigates the temperature dependence of crystal structure and dielectric response in a nanocomposite material containing porous glasses and embedded sodium nitrate. The results reveal a crossover point in the temperature dependence of the order parameter of the structural transition in sodium nitrate nanoparticles, as well as a decrease in activation energy of sodium ions hopping conductivity during heating.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Lijun Cheng, Fang Cheng
Summary: This paper investigates the effects of electric and magnetic fields on the Goos-Hanchen (GH) shift in a semi-Dirac system. The results show that the magnitude and direction of the GH shift depend on various factors such as incidence angle, electric barrier height and width, and magnetic field. It is observed that there is a saltus step in GH shifts at the critical magnetic field, which decreases with increased potential barrier thickness. Additionally, the GH shift can be significantly enhanced by applying an electric field in the III region. These findings are important for the development of semi-Dirac based electronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Alexander K. Fedotov, Uladzislaw E. Gumiennik, Julia A. Fedotova, Janusz Przewoznik, Czeslaw Kapusta
Summary: The study conducted an improved analysis of carrier transport in single-layer graphene and hybrid structures, showing the coexistence of negative and positive contributions in magnetoresistive effect. Various models were used to analyze the dependences on temperature and magnetic field, providing insights into the behavior of electrical resistance in the structures.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xuhui Peng, Tao Chen, Ruotong Chen, Shizheng Chen, Qing Zhao, Xiaoping Huang
Summary: In this study, a novel method was proposed to design and fabricate optoelectronic devices with highly precise controlled photorefractive liquid crystal structures. By utilizing quantum dots and electric tuning, a regular periodic grating was formed in a quantum dot-doped liquid crystal volume illuminated by a laser standing evanescent wave field. The obtained optical diffraction pattern showed equally spaced light spots and high diffraction efficiency, indicating a significant change in the refractive index of the nanostructured device.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Kai-Hua Yang, Xiao-Hui Liang, Huai-Yu Wang, Yi-Fan Wu, Qian-Qian Yang
Summary: In this work, a theoretical model is proposed to achieve the controllability of quantum interference and decoherence. The effects of intralead Coulomb interaction, interdot tunneling, and electron-phonon interactions on differential conductance are investigated. The results show the appearance of destructive interference, Fano interference, and negative differential conductance in strong dot-lead tunneling regions, while a characteristic pattern of positive and negative differential conductances appears in the weak dot-lead tunneling regime.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xueying Wang, Qian Ma, Qi Zhang, Yi Wang, Lingyu Li, Dongheng Zhao, Zhiqiang Liu
Summary: Porous double-channel alpha-Fe2O3/SnO2 heterostructures with tunable surface/interface transport mechanism were successfully fabricated by electrospinning and calcination. These heterostructures exhibited a large specific surface area, providing more active sites and enhanced adsorption capacity. The optimal composite materials showed the highest response value and the fastest response/recovery times to DMF, along with good cycling performance, long-term stability, and high gas selectivity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Donglin Guo, Zhengmeng Xu, Chunhong Li, Kejian Li, Bin Shao, Xianfu Luo, Jianchun Sun, Yilong Ma
Summary: Using full electron-phonon interactions and the Boltzmann transport equation, this study investigates the phonon scattering channel and electrical properties of graphene under anharmonic phonon renormalization (APRN). The results show that the APRN reduces the phonon frequency and three-phonon phase space with increasing temperature, affecting the acoustic branch more than the optical branch. The thermal conductivity of graphene decreases after considering three- and four-phonon scattering, and the primary scattering channels are identified. Furthermore, the APRN increases the strength of electron-phonon coupling and leads to an increase in n-type electric resistance at room temperature.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Hongping Zhao, Man Zhao, Dayong Jiang
Summary: The study proposes a broadband photodetector with high response, high sensitivity, and controllable band by integrating quantum dots and highly conductive materials. The PD composed of ZnO film/PbS quantum dots heterostructure shows excellent photoresponse performance in the UV-Vis-NIR range, with the peak responsivity increased by 550%, accompanied by significant red shift, faster response, and recovery speed. By using RF magnetron sputtering to prepare ultra-thin ZnO film, the impact of PbS quantum dots on the photoelectric properties of ZnO film is comprehensively and systematically discussed.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Ye Xuan Meng, Liwei Jiang, Yisong Zheng
Summary: Manipulating magnetism by electrical means is an effective method for realizing ultra-low power spintronic-integrated circuits. In this study, it is demonstrated that the two-dimensional semiconductor material InO monolayer can be tuned to a half-metallic state by applying a gate voltage, providing theoretical guidance for adjusting two-dimensional magnetic semiconductors.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Anusha Kachu, Aalu Boda
Summary: In this research, we investigated the impact of confinement nature on a neutral hydrogenic donor impurity in a quantum dot. The study demonstrated intriguing behavior in response to changes in potential shape, quantum dot parameters, and spin-orbit coupling strengths. The findings provide valuable insights into the fundamental physics of quantum dots and impurities and can aid in the design and optimization of QD-based technologies.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)