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Mixed-Dimensional Semiconductors-Based Ternary Circuits with Tunable Negative Transconductance Characteristics.
ACS Appl Mater Interfaces
January 2025
Institute of Advanced Materials and Systems, Sookmyung Women's University, Seoul 04310, Republic of Korea.
Multivalued logic (MVL) systems, in which data are processed with more than two logic values, are considered a viable solution for achieving superior processing efficiency with higher data density and less complicated system complexity without further scaling challenges. Such MVL systems have been conceptually realized by using negative transconductance (NTC) devices whose channels consist of van der Waals (vdW) heterojunctions of low-dimensional semiconductors; however, their circuit operations have not been quite ideal for driving multiple stages in real circuit applications due to reasons such as a reduced output swing and poorly defined logic states. Herein, we demonstrate ternary inverter circuits with near rail-to-rail swing and three distinct logic states by employing vdW p-n heterojunctions of single-walled carbon nanotubes (SWCNT) and MoS where the SWCNT layer completely covers the MoS layer.
View Article and Find Full Text PDFExperimental and Computational Synthesis of TiO Sol-Gel Coatings.
Langmuir
January 2025
Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary.
During the experimental formation of sol-gel coatings, the colloid dispersions go through a drying process, and the structure of the coatings is formed as a result of complex chemical, colloidal, and capillary interactions. While computer simulations provide guidelines to tune and even design the nanomaterials synthesis, simulations of coating structure formation are hitherto unknown in the literature. Based on real experiments, we establish here a ReaxFF reactive force field-based molecular dynamics simulation protocol in order to investigate and determine the role of the experimental conditions on the pore structure formation in the coatings.
View Article and Find Full Text PDFAn organic-inorganic polyacrylamide-based surface imprinted quantum dots for the impedimetric and voltammetric detection of diazepam in saliva with smartphone readout.
Talanta
April 2025
Leverhulme Research Centre for Forensic Science, School of Science and Engineering, University of Dundee, Dundee, DD1 4HN, UK.
Diazepam (DZP) is a muscle-relaxing, anxiety-relieving sedative drug; nonetheless, it is also an addictive drug that may be abused. This work reports on the development of a novel electrochemical nanosensor for diazepam using SiO-encapsulated-3-mercaptopropionic acid-capped AuZnCeSeS quantum dots (QDs) overcoated with a molecularly imprinted polymer (MIP) on screen-printed carbon electrodes (SPCEs). Electrochemical, spectroscopic and electron microscopic characterization of the nanomaterial and modified electrode surface was carried out and is reported herein.
View Article and Find Full Text PDFInvestigation of Ti nanostructures laboratory scanning-free GEXRF.
Nanoscale
December 2024
Technical University of Berlin, Hardenbergstraße 36, 10623 Berlin, Germany.
The ability to characterize periodic nanostructures in the laboratory gains more attention as nanotechnology is widely utilized in a variety of application fields. Scanning-free grazing-emission X-ray fluorescence spectroscopy (GEXRF) is a promising candidate to allow non-destructive, element-sensitive characterization of sample structures down to the nanometer range for process engineering. Adopting a complementary metal-oxide semiconductor (CMOS) detector to work energy-dispersively single-photon detection, the whole range of emission angles of interest can be recorded at once.
View Article and Find Full Text PDFEnhanced Barrier and Optical Properties of Inorganic Nano-Multilayers on PEN Substrate Through Hybrid Deposition.
Materials (Basel)
December 2024
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.
Article Synopsis
- A new inorganic multilayer barrier film was created on polyethylene naphthalate (PEN) using advanced deposition techniques, combining a SiO layer from ICP-CVD and an AlO/ZnO nanolaminate from PEALD.
- The resulting film has impressive optical transmittance of 88.1% and low water vapor permeability of 3.3 × 10 g/m/day, demonstrating effective collaboration between the two growth methods.
- The study indicates that the PEALD layer repairs defects in the SiO layer and the multilayer structure enhances performance, making it suitable for long-lasting organic electronic device encapsulation.
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