NanoTechnology: Materials, Processes & Devices

2D materials are among the most promising candidates for next-generation semiconductor devices due to their exceptional electronic transport properties and composition of a single atomic layer, which offers significant advantages for integration density. However, high contact resistance and challenges in doping present obstacles to their practical applications. In this work, we aim to explore various methods to overcome these issues and achieve technological breakthroughs that will enable these materials to become integral components in a wide range of applications.

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Metal-organic frameworks (MOFs) are porous, high surface area materials that consist of metal-cluster nodes connected by organic linkers to form highly ordered structures with various pore geometries and chemical properties. Due to their unique and tunable structure, MOFs have shown substantial promise in a broad range of applications, including chemical sensing, gas adsorption and separation, and catalysis. To investigate the intrinsic properties of MOFs for their sensing performance, single crystals are ideal platforms that mitigate the impact of defects, impurities, and grain...

High contact resistance has been a bottleneck in developing high-performance transition-metal dichalcogenide (TMD) based p-type transistors. We report degenerately doped few-layer WSe2 transistors with contact resistance as low as 0.23 ± 0.07 kΩ·μm per contact by using platinum(IV) chloride (PtCl4) as the p-type dopant, which is composed of ions compatible with the complementary metal-oxide-semiconductor (CMOS) fabrication process. Top-gated devices with a gate length of 200 nm showed good switching behaviors, implying that the dopant diffusion into the gate stack is not significant. The...

Nanocrystalline pristine and Pd-loaded tin (IV) oxide (SnO2) nanocomposites with different loadings were synthesized via facile impregnation and in-situ reduction, followed by annealing. The crystal structure and morphology of the samples were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. X-ray photoelectron spectroscopy, Raman spectroscopy and ex-situ extended X-ray
absorption fine structure (EXAFS) confirm PdO nanoclusters stabilized on SnO2 surface. Results revealed that Pd/SnO2 with 2.8 wt% loading exhibits the best sensing...