Article
Chemistry, Physical
Janardhanan R. Rani, Nayan C. Das, Minjae Kim, Jae-Hyung Jang
Summary: This study investigates the resistive switching characteristics of reduced graphene oxide-phosphor composites (GPs) at low temperatures. The experiments show that the fabricated devices have reliable and reproducible performance at low temperatures, and the performance can be further improved through light illumination.
Article
Physics, Applied
L. A. Makarova, Yu A. Alekhina, D. A. Isaev, M. F. Khairullin, N. S. Perov
Summary: The study focused on the multiferroic properties and magnetoelectric effect of novel layered structures comprising piezoelectric polymer and magnetoactive elastomer. The investigation involved experimental and numerical characterization, with the potential application in sensors and energy-harvesting devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Analytical
Mijin Kim, Dongjin Kim, Ohun Kwon, Honyeon Lee
Summary: The reliable manufacture of flexible transparent electrode is important for the fabrication of high-performance, flexible QLEDs. In this study, we deposited a transparent oxide/metal/oxide (OMO) electrode on a polymer planarization layer and achieved good electron supply and injection. The high-performance flexible QLEDs fabricated using these electrodes had significantly higher current efficiency than rigid QLEDs with ITO electrodes.
Article
Nanoscience & Nanotechnology
H. Lu, S. J. Ho, H-S Chen, A. C-M Yang
Summary: This study examined the interactions of core-shell QDs (CdSe/ZnS) embedded in polymer films with heterojunction substrate fields, influencing the photoluminescence (PL) of the QDs. It was found that QD particles tend to undergo depth segregation in nano films, with the PL affected by heterojunction interactions showing a film thickness effect dependent on substrate band gap size. These interactions were further studied through alterations of film morphology, with implications for QD optoelectronic applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Jie Chen, Zhen Wang, Xiaoyong Zhang, Weixing Chen, Yan-Jun Liu, Yifei Wang
Summary: Dielectric polymer-based composites have great potential in electrostatic film capacitors, but achieving high energy storage density is challenging for linear dielectric polymer-based composites at weak field strengths. This study proposes a tri-layered configuration of multicomponent polymeric films with a nonlinear polymer layer incorporating a small number of modified barium titanate particles, which leads to improved dielectric constants and energy storage density.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Ha Trang Nguyen, Thanh Thao Tran, Vishwa Bhatt, Manjeet Kumar, Ju-Hyung Yun
Summary: Hybrid nanostructures composed of quantum dots and metal nanoparticles have unique optical properties, and can be used to control photoluminescence in optoelectronic applications. By controlling the composition and size of the structure, the interaction between excitons and plasmon can be investigated, and the power conversion efficiency of silicon solar cells can be improved.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Environmental Sciences
Vesta Skrodenyte-Arbaciauskiene, Renata Butrimiene, Agne Kalnaityte-Vengeliene, Saulius Bagdonas, Danguole Montvydiene, Milda Stankeviciute, Gintare Sauliute, Kestutis Joksas, Nijole Kazlauskiene, Rolandas Karitonas, Nataliia Matviienko, Zivile Jurgelene
Summary: This study evaluated the effects of dietary exposure to CdSe/ZnS-COOH QDs on Salmo trutta fario L. juveniles at molecular, cellular, physiological, and whole-organism levels. The results showed that fish feeding with QDs-contaminated feed led to increased liver somatic index, genotoxic effect on erythrocytes, altered enzyme activity, and decreased MDA level. High levels of Cd were also found in the gills and liver tissues of the exposed fish. Furthermore, the gut microbiota of the QDs-exposed fish exhibited a decreasing trend in alpha diversity indexes and significant taxonomic differences compared to the control group. The relative abundance of some taxa, such as Citrobacter and Mycoplasma, was significantly changed in the QDs-exposed group compared to the control group.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Nanoscience & Nanotechnology
Joshua M. Kubiak, Buxuan Li, Mathew Suazo, Robert J. Macfarlane
Summary: The distribution of filler particles within a polymer matrix nanocomposite significantly affects its properties and processability. This study presents a strategy for preparing functional composites with enhanced thermal conductivity. The thermal cross-linking of self-suspended polymer grafted nanoparticles is used to achieve homogeneously dispersed, non-percolating alumina particles in an organic matrix.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Salomao Dos Santos Costa, Juliana Pereira da Silva, Matheus Moraes Biondo, Edgar Aparecido Sanches, Marcos Marques Da Silva Paula, Francisco Xavier Nobre, Jose Anglada Rivera, Yohandys Alexis Zulueta, Milton S. Torikachvili, David Vieira Sampaio, Marcos Vinicius Dias Vermelho, Stefan Talu, Lianet Aguilera Dominguez, Yurimiler Leyet
Summary: The temperature dependence of the electrical properties of composites formed by biphasic sodium titanate and poly(o-methoxyaniline) was studied. The structural details were confirmed by X-ray diffraction, and the thermal properties were analyzed by thermogravimetry and differential thermal analysis. The complex impedance spectroscopy measurements showed that the electrical resistivity of the composites increased with POMA content, and the highest POMA content exhibited a less noticeable temperature coefficient of resistivity.
Article
Engineering, Electrical & Electronic
J. D. Sanchez-Vasquez, B. Portillo-Rodriguez, E. Tovar-Martinez, M. Reyes-Reyes, R. Lopez-Sandoval
Summary: Non-volatile organic memory devices were fabricated using polystyrene sulfonate (PSS) + nitrogen-doped multi-walled carbon nanotubes (NCNTs) composites on glass and PET substrates. The memory devices showed different electrical properties depending on the NCNTs concentrations in the PSS matrix and the bottom electrode material. The devices exhibited both WORM-like behavior and rewritable memory behavior, which was attributed to charge trapping/detrapping processes and the generation of oxygen vacancies (V-O) in the Al oxide layer. The presence of physical deformations (bubbles) on the top electrode was observed in devices with Al as the bottom electrode, but not in devices with ITO as the bottom electrode.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Green & Sustainable Science & Technology
Savisha Mahalingam, Abreeza Manap, Kam Sheng Lau, Dita Floresyona, Rinaldi Medali Rachman, Sylvia Ayu Pradanawati, Ramisha Rabeya, Chin Hua Chia, Nurfanizan Afandi, Agung Nugroho
Summary: Recent advances in portable electronics have led to new applications in everyday life. However, the use of non-renewable polymeric materials in these devices raises environmental concerns. Biopolymers, derived from renewable sources, have emerged as a promising alternative due to their flexibility and lightweight. To improve their conductivity, biopolymers are often combined with conductive materials. These biopolymer-based conductive composites offer excellent electrical conductivity and mechanical properties. This review focuses on their applications in energy storage, self-powered devices, and wearable sensors. The development of flexible biopolymer-based conductive composites has been most prominent in energy storage, while self-powered devices have seen the least progress. The wearable performance of these devices is crucial for their sustainability and reliability in daily activities.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Optics
Xuefeng Peng, Zhijian Wu, Chen Ye, Yang Ding, Wei Liu
Summary: The emission features of Cdse/ZnS quantum dots doped step-index polymer optical fibers are computationally analyzed in this paper. Spontaneous emission and amplified spontaneous emission were calculated based on a theoretical model, and the calculated parameters were derived from experiments. Through comparative analysis, it was found that the pump power and overlap between emission and absorption cross-sections are the main reasons for the red shift of output spectra. The output spectra will rapidly decrease in width and fall back toward the maximum emission cross-section when the pump power exceeds the threshold of amplified spontaneous emission. The final output wavelength is still affected by doping concentration and pump power, while amplified spontaneous emission is not generated when the total number of doped quantum dots is less than 1.27 x 10(12).
Review
Materials Science, Characterization & Testing
Md Abu Shaid Sujon, Aminul Islam, Venkata Karthik Nadimpalli
Summary: This review article provides a comprehensive overview of fiber and nanoparticle reinforced polymer matrix composites (PMC) for their damping and sound absorption properties, discussing the governing parameters responsible for the variation of these properties.
Article
Chemistry, Multidisciplinary
Kai Zhang, Yue Xu, Fan Liu, Guo-Ping Yan, San-Wei Guo
Summary: Novel cooperative ZnS-CdSe@Co/N-C core/shell composites were prepared by chelation and modification, which possessed heterojunction and cocatalyst properties, and showed improved optical absorption and photocatalytic properties.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Analytical
Quanxiu Zhou, Zhaofa Li, Qunfang Wang, Liang Peng, Shihe Luo, Feng Long Gu
Summary: In this study, poly(styrene-co-maleic anhydride)-capped CdSe/ZnS quantum dots aminolyzed with ethanolamine were proposed as fluorescent probes for the detection of Cu2+ and Hg2+, with different quenching mechanisms discussed. The coordination abilities of the surface polymer of CdSe/ZnS QDs and the two metal ions were calculated using density functional theory. The probes showed high sensitivity to both Cu2+ and Hg2+, with fast response times and the ability to detect the ions within minutes.
ANALYTICAL METHODS
(2021)
