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Highly Strained Polymeric Monolayer Stacked for Wafer-Scale and Transferable Nanodielectrics.
ACS Nano
December 2024
Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China.
As the keystones of molecular electronics, high-quality nanodielectric layers are challenging to assemble due to the strictest criteria for their reliability and uniformity over a large area. Here, we report a strained poly(4-vinylphenol) monolayer, ready to be stacked to form defect-free wafer-scale nanodielectrics. The thickness of the nanodielectrics can be precisely adjusted in integral multiples of the 1.
View Article and Find Full Text PDFEffect of nickel and copper shells on mechanical properties of advanced lightweight TPU metamaterials during uniaxial compression.
Sci Rep
December 2024
Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, 15875-4413, Iran.
This study explores the impact of metallic shells by electroforming method on the mechanical behavior of thermoplastic polyurethane (TPU)-based lattice structures. First, the TPU lattice structures were printed by additive manufacturing technique. Then layers of Ni and Cu as a thin shell were dressed on the TPU lattice structures in the electroforming baths of Ni and Cu solutions.
View Article and Find Full Text PDFNonlinear coupling of closely spaced modes in atomically thin MoS nanoelectromechanical resonators.
Microsyst Nanoeng
December 2024
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, 32611, USA.
Nanoelectromechanical systems (NEMS) incorporating atomic or molecular layer van der Waals materials can support multimode resonances and exotic nonlinear dynamics. Here we investigate nonlinear coupling of closely spaced modes in a bilayer (2L) molybdenum disulfide (MoS) nanoelectromechanical resonator. We model the response from a drumhead resonator using equations of two resonant modes with a dispersive coupling term to describe the vibration induced frequency shifts that result from the induced change in tension.
View Article and Find Full Text PDFHighly Efficient, Electro-thermal Heater Based on Marangoni-Driven, Oriented Reduced Graphene Oxide/Poly(ether imide) Nanolaminates.
ACS Appl Mater Interfaces
December 2024
Institute of Chemical Engineering Sciences, Foundation of Research and Technology- Hellas (FORTH/ICE-HT), Stadiou Street, Platani, Patras 26504, Greece.
Due to their outstanding electrical and thermal properties, graphene and related materials have been proposed as ideal candidates for the development of lightweight systems for thermoelectric applications. Recently, the nanolaminate architecture that entails alternation of continuous graphene monolayers and ultrathin polymer films has been proposed as an efficient route for the development of composites with impressive physicochemical properties. In this work, we present a novel layer-by-layer approach for the fabrication of highly ordered, flexible, heat-resistant, and electrically conductive freestanding graphene/polymer nanolaminates through alternating Marangoni-driven self-assembly of reduced graphene oxide (rGO) and poly(ether imide) (PEI) films.
View Article and Find Full Text PDFRobust and ultra-thin nanocellulose/MXene composite film and its performance in efficient electricity-generation and sensing.
Int J Biol Macromol
December 2024
Department of Plastic and Cosmetic Surgery, Treatment Center of Burn and Trauma, Affiliated Hospital of Jiangnan University, Wuxi 214122, China. Electronic address:
The conversion of mechanical energy into electrical energy by triboelectric nanogenerators (TENG) has attracted attention in recent years, particularly in the field of wearable sensor. In this work, TEMPO-oxidized cellulose nanofibers (TOCNF) with carboxylate groups were compounded with MXene to serve as both the negative friction layer and the electrode in assembling a TENG with nylon. The synergistic effect between TOCNF and MXene was analyzed to disclose its influence on the performance of the as-prepared TENG.
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