Article
Polymer Science
Sachin Sharma Ashok Kumar, Nujud Badawi Mohammed, Osamah Alduhaish, Kasi Ramesh, Subramaniam Ramesh, Mujeeb Khan, Baji Shaik, Syed. F. Adil
Summary: The researchers fabricated graphene/TiO2-based nanocomposite coating systems by adding TiO2 nanoparticles into the acrylic-epoxy polymeric matrix. The properties of the coatings were investigated using various testing methods. The results showed that the TiO2 nanoparticles were successfully decorated on the graphene surface and exhibited good dispersibility and uniform distribution within the polymeric matrix.
Article
Polymer Science
Chao Wu, Ruidong Wu, Lik-ho Tam
Summary: This paper investigates the creep behavior of CNT/PP nanocomposite and finds that the increase in CNT content leads to a decrease in creep properties, which is related to the restriction effect of CNT on PP chain behavior.
POLYMER DEGRADATION AND STABILITY
(2022)
Review
Chemistry, Multidisciplinary
Shaojie Wang, Zhen Luo, Jiajie Liang, Jun Hu, Naisheng Jiang, Jinliang He, Qi Li
Summary: Polymer nanocomposite dielectrics with exceptional electric properties are discussed in this critical overview. The role of the matrix/particle interface in determining the performance of these materials is emphasized. Various experimental strategies and characterization techniques for studying the local property-structure correlation of the interface are analyzed, with a focus on their unique capabilities. The limitations of each strategy are evaluated and compared, and future research directions are proposed.
Article
Materials Science, Composites
Jingxian He, Yukang Fan, Chaohu Xiao, Fang Liu, Hanxue Sun, Zhaoqi Zhu, Weidong Liang, An Li
Summary: A novel acetylene black-doped dual-crosslinked hydrogel composite has been developed for solar steam generation, showing excellent light absorption and fast water transmission performance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Tamas Lukacs, Csongor Pereszlai, Norbert Geier
Summary: This research develops a drilling-induced delamination measurement method in fibrous polymeric composites based on the image differentiation principle. It can effectively distinguish drilling-induced delamination from other material defects, and has a wide range of applications.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Polymer Science
Hari P. V. S. Prashanth, Elammaran Jayamani, Kok Heng Soon, Md. Rezaur Rahman, Muhammad Khusairy Bin Bakri
Summary: This study demonstrated the characterization of a flax fiber reinforced polypropylene-strontium titanate composite and dielectric study for low-k dielectric applications. The composite showed higher thermal stability, increased dielectric constants with the addition of strontium titanate, and reduced dielectric losses at higher frequencies with the inclusion of natural fibers and ceramic.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Qing Wu, Huanhuan Bai, Aijun Gao, Jianfeng Zhu
Summary: In this study, high-density grafting of carbon nanotube/carbon nanofiber (CNT/CNF) on carbon fiber surface was achieved, leading to improved interfacial shear strength. This reinforcement effect is mainly attributed to the improved wettability and the provision of sufficient hydrogen bonding and pinning effect. The appropriate amount of CNT/CNF hybrid also resulted in a gradual modulus transition at the interface, reducing stress concentration.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Scott Stonemeyer, Mehmet Dogan, Jeffrey D. Cain, Amin Azizi, Derek C. Popple, Austin Culp, Chengyu Song, Peter Ercius, Marvin L. Cohen, Alex Zettl
Summary: Fine control over material synthesis on the nanoscale has allowed for the selective creation of one-dimensional TaTe3 chains or two-dimensional TaTe2 nanoribbons using carbon nanotube reaction vessels. This control extends to the number of chains or the thickness and width of nanoribbons. Transmission electron microscopy and scanning transmission electron microscopy provide detailed atomic structure of the encapsulated materials, revealing complex superstructures such as multichain spiraling and multilayer moire patterns.
Article
Engineering, Manufacturing
Nur Adilah Abu Hassan, Sahrim Ahmad, Ruey Shan Chen, Valliyappan David Natarajan
Summary: This study examined the impact of kenaf fiber loadings on the properties of polylactic acid composites, finding that foaming with ADC reduced density, increased impact strength, and improved sound absorption.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Yaohua Gong, Xun'an Zhang, Tao Huang, Xinghao Li, Yongyong Suo, Shuyi Zhao
Summary: This study investigates the effect of nano-TiO2 modified epoxy on nano-doped polymer and nano-doped 3D woven composites, with results showing improvements in properties at 8 wt% nanoparticle addition. The addition of nanoparticles enhances the tensile modulus and compressive strength of NP composites, with fracture toughness of NP composites and compressive strength of NW composites showing the best improvement at 8 wt% addition. Scanning electron microscope images are used to evaluate the failure mechanisms of the composites.
POLYMER COMPOSITES
(2021)
Article
Nanoscience & Nanotechnology
Ashley L. Kaiser, Amy R. Vanderhout, Luiz H. Acauan, Azreen Zaman, Dale L. Lidston, Itai Y. Stein, Brian L. Wardle
Summary: This study investigates the adhesion strength between aligned carbon nanotube arrays and substrates by using a simple thermal post-growth processing method. The results show that the adhesion strength evolves in three different regimes with changes in temperature. This research provides insights into the interfacial interactions and the ability to tune the array strength, which has significant implications for applications such as sensors, energy devices, and nanoelectromechanical systems (NEMS).
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Multidisciplinary
M. R. Mansouri, P. F. Fuchs, M. Baghani, C. Schuecker
Summary: It is apparent from the literature that the matrix-fiber mechanical interaction significantly affects the macroscopic constitutive response of hyperelastic fiber reinforced materials. This study aims to model the degradation of macroscopic mechanical properties by considering the microscopically visible matrix-fiber interfacial debonding for cyclically deformed soft composites. The pseudoelastic model based on hyperelastic strain energy functions is used to evaluate inelastic phenomena and predict the residual strain and damage in the material.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
Yitong Ding, Qian Zhou, Xingwei Li, Ying Xiong, Shaoyun Guo
Summary: In this study, a melt blending method was used to prepare light-scattering materials with improved performance. The scattering range and uniformity were enhanced while the percolation threshold of scattering angle was reduced.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Subodh Shrivastava, Shubhra Mathur, Nutan Sharma, Ankit Kumar Vishwakarma, Chagan Lal Saini, S. P. Nehra
Summary: In this study, conducting MWNT/PANI nanocomposite was successfully synthesized using in-situ oxidative polymerization at low temperatures. The physicochemical properties of the nanocomposite were characterized, and the effect of MWNT loading on the gas sensing properties for hydrogen gas was analyzed. The results showed that the addition of MWNT improved the crystallite, conductivity, stability, and morphology of the composite material. The MWNT/PANI thin film sensor demonstrated high sensitivity and fast response for hydrogen gas detection at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Polymer Science
Remzi Gurbuz, Baran Sarac, Viktor Soprunyuk, Amir Rezvan, Eray Yuce, Wilfried Schranz, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study successfully fabricated defect-free composite elastomeric fibers with uniform fiber diameter and distribution, and analyzed the crystallization and mechanical properties at low temperatures. The results showed a remarkable increase in decomposition temperatures and storage/loss modulus when small amounts of carbon nanotubes were present. Dynamic mechanical treatment also revealed the influence of PEO content on the fibers. X-ray diffraction and scanning electron microscopy confirmed the crystalline nature of the fibers.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Ghazaleh Khoshroo, Andras Sapi, Imre Szenti, Anastasiia Efremova, Henrik Bali, Kornelia B. Abrahamne, Andras Erdohelyi, Akos Kukovecz, Zoltan Konya
Summary: This work investigates the effect of Potassium promoter and calcination temperature on the catalytic activity in the dry reforming of methane reaction. Trimetallic catalysts showed a more favorable CO/H2 ratio and better coke resistance compared to the reference catalyst Ni-Al2O3.
Article
Materials Science, Multidisciplinary
Danvendra Singh, Apurv Sibal, Deepika Sharma, Sumit Sharma, Bhabani K. Satapathy, Parikshit Goswami, Akos Kukovecz, Amit Rawal, Daniel Sebok
Summary: Electrospun is a unique class of materials with multiple scales and surface functionalities, and upscaling their properties from the lab to industry is often limited by a lack of understanding. In this study, a theoretical framework was developed to predict the elastic properties of electrospun mats, considering the properties of constituent fibers, fiber alignment, and curvature. The framework successfully predicted the elastic moduli of the mats, validated by X-ray nanoCT analysis, and showed good agreement with experimental data for different types of electrospun mats.
MECHANICS OF MATERIALS
(2023)
Article
Chemistry, Physical
Owais Al-Aqtasha, Ferenc Farkas, Andras Sapi, Imre Szenti, Tamas Boldizsar, Kornelia B. Abrahamne, Akos Kukovecz, Zoltan Konya
Summary: This paper discusses the overlooked source of emissions from non-road mobile machinery and proposes a solution using an efficient catalyst. By analyzing the relevant properties of the catalyst and its performance, a significant reduction in CO and NOx emissions is achieved. This research will be the first part of a tailored solution to reduce emissions from non-road mobile machinery.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Chemistry, Physical
Mahsa Abedi, Akos Szamosvolgyi, Andras Sapi, Akos Kukovecz, Zoltan Konya, Tamas Gyulavari, Zsolt Pap
Summary: Strontium titanate (STO) photocatalysts were prepared using a modified Pechini sol-gel method, with a unique rapid calcination technique. The samples were characterized and evaluated for their photocatalytic activity against various pollutants under UV light irradiation. The STO catalysts showed higher activity than the commercial reference, and their stability was demonstrated by retaining their crystalline composition after exposure to chemicals. Additionally, the unique calcination technique was found to be 35% more cost-effective compared to a conventional method.
Article
Chemistry, Physical
Aleksandar Markovic, Sladana Savic, Andrej Kukuruzar, Zoltan Konya, Dragan Manojlovic, Milos Ognjanovic, Dalibor M. Stankovic
Summary: In this study, different synthesis procedures for making PbO2-graphitic carbon nitride (g-C3N4) electrode were examined for the electrochemical degradation of Reactive Black 5 (RB5) textile azo dye. PbO2 with varying morphology was formed through the reaction of PbOH3- with ClO- in the presence of different surfactants (CTAB and TBAP) under conventional conditions. The obtained materials were combined with g-C3N4 and characterized morphologically and electrochemically. The composite of PbO2 synthesized using CTAB as template and g-C3N4 showed the best performance for RB5 dye removal, suggesting its potential for wastewater treatment and pollutant removal.
Article
Pharmacology & Pharmacy
Ferenc Istvan Nagy, Dora Izabella Adamecz, Adam Baji, Agnes Kiricsi, Ildiko Huliak, Andrea Ronavari, Zoltan Konya, Eva Frank, Mohana Krishna Gopisetty, Monika Kiricsi
Summary: In this study, novel semi-synthetic dihydrotestosterone derivatives were found to inhibit the efflux activity of multidrug-resistant cancer cells and enhance their sensitivity to chemotherapy drugs. These derivatives induced endoplasmic reticulum stress and triggered apoptosis in cancer cells. Therefore, they have the potential to overcome multidrug resistance in cancer therapy.
Article
Nanoscience & Nanotechnology
Elvin Y. Malikov
Summary: The concrete strengthening additive based on multi-walled carbon nanotubes was synthesized through radical polymerization, by reacting oxidized nanotubes with maleic anhydride and alpha-nonene monomers. The nanotubes, used as the main reinforcing component, were synthesized via catalytic chemical vapor deposition using Fe-Co/Al2O3 catalyst. Characterization of the resulting nanocomposite was performed using TEM, SEM, FTIR, XRD and Raman techniques. Mechanical property investigation showed that the obtained nanostructure has a potential of approximately 51.3% for concrete strengthening.
INTERNATIONAL JOURNAL OF NANOSCIENCE
(2023)
Article
Chemistry, Physical
Mohit Yadav, Haythem S. Basheer, Adam Agfalvi, Kornelia B. Abrahamne, Janos Kiss, Gyula Halasi, Andras Sapi, Akos Kukovecz, Zoltan Konya
Summary: Enhanced photocatalytic performance of CO2 reduction was achieved with noble metal-deposited TiO2 photocatalysts (NMD/TiO2) under visible light and UV. NMD-TiO2 samples showed improved photoefficiency for CO2 reduction and selectivity towards CO. Different noble metals had varying effects on the conversion yields of CO2 to CO.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Endre-Zsolt Kedves, Claudiu Fodor, Akos Fazekas, Istvan Szekely, Akos Szamosvolgyi, Andras Sapi, Zoltan Konya, Lucian Cristian Pop, Lucian Baia, Zsolt Pap
Summary: This study showed that MoO3 can effectively inhibit the rate of Fenton reactions, thus reducing the decomposition of organic compounds, which might be due to the scavenging effect of MoO3 on OH radicals. The results also demonstrated that the inhibition efficiency of MoO3 is strongly correlated with the acidification rate of the solution.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Tamas Boldizsar, Henrik Bali, Imre Szenti, Imre Sebok-Papp, Zsolt Ban, Sara Herczeg, Gabor Barna, Andras Sapi, Akos Kukovecz, Zoltan Konya
Summary: In this study, lightweight cordierite-mullite ceramics with high strength and high thermal-shock resistance were successfully synthesized using hollow ceramic microspheres. The resulting cordierite material had a low bulk density of 1.40 g/cm3, apparent porosity of 44.78%, flexural strength of 20.17 MPa, and coefficient of thermal expansion of 2.26 x 10-6 oC-1, compared to the bulk counterpart with a bulk density of 2.00 g/cm3, apparent porosity of 25.75%, flexural strength of 23.69 MPa, and coefficient of thermal expansion of 2.47 x 10-6 oC-1. As a catalyst support, the economical cordierite showed the same stability and activity in CO2 hydrogenation towards C5+ fuels as the bulk cordierite-based catalyst counterparts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ibolya Zita Papp, Adel Szerlauth, Timea Szucs, Peter Belteky, Juan Fernando Gomez Perez, Zoltan Konya, Akos Kukovecz
Summary: Hybrid thin film sensors based on semiconductor oxides and carbon nanostructures were fabricated and characterized in this study. The hybrid layer, consisting of ZnO nanoparticles, milled multiwalled carbon nanotubes, and conducting polymer, showed enhanced performance in gas sensing tests and as an ultraviolet photodetector. The results suggest the potential usability of this composite in further sensor applications.
Article
Chemistry, Multidisciplinary
Marton Szabados, Tamara Szabados, Robert Mucsi, Kornelia Baan, Janos Kiss, Akos Szamosvolgyi, Andras Sapi, Zoltan Konya, Akos Kukovecz, Pal Sipos
Summary: The use of rare nickel-poor and aluminum-rich layered double hydroxides (LDHs) as catalyst precursors in CO2 hydrogenations highlights the importance of the chemical quality of the interlayer anions. The thermal stability and chemical properties of the anions significantly affect the reaction outcomes. The choice and removal of the anions result in differences in LDH transformation, reducibility of Ni(II), and specific surface area of the resulting metal oxides. Furthermore, the conversion and selectivity are correlated with the abundance and strength of base and acid sites in the LDHs.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Materials Science, Composites
Siddharth Shukla, Sumit Sharma, Kamlesh Koul, Harshvardhan Saraswat, Livia Vasarhelyi, Amit Rawal, Akos Kukovecz
Summary: The increasing global population, agriculture expansion, and the negative impact of climate change have led to a rising demand for available water resources. Researchers have developed a material inspired by the unique water collection systems of organisms in arid regions, which shows remarkable fog harvesting capabilities.
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Peter B. Nagy, Lakshmi Shiva Shankar, Marton Szabados, Hala Roumia, Akos Kukovecz, Robert Kun, Tamas Szabo
Summary: In this study, the interactions between SNPs, polycations, and GO were quantitatively characterized, and it was found that mass ratios of polycation to SNP beyond the isoelectric point could promote the heteroaggregation between SNPs and GO and alleviate the migration of lithium polysulfides. The synthesized composite cathode exhibited excellent electrochemical performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
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)
