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Project Summary: Two-dimensional (2D) crystals have renewed opportunities in design and assembly of artificial lattices without the constraints of epitaxy. However, the lack of thickness control in exfoliated van der Waals layers prevents realization of repeat units with high fidelity.
Project Summary: The highest quality hexagonal boron nitride (hBN) crystals are grown from molten solutions. For hBN crystal growth at atmospheric pressure, typically the solvent is a combination of two metals, one with high boron solubility and the other to promote nitrogen solubility. This study demonstrates that high quality hBN crystals can be grown at ambient pressure using pure iron as a flux which is unexpected given the low solubility of nitrogen in iron.
Project Summary: The electronic properties of transition metal dichalcogenides (TMDs) vary dramatically depending on their phase (2H vs. 1T) and ans the energy to convert between the two phases is predicted to be relatively low. This has sparked interest in the use of the phase change properties of TMDs for active components in electronic devices.
Project Summary: Two-dimensional transition metal dichalcogenides such as MoS2 have created avenues for exciting physics with unique electronic and photonic applications.
Bayesian networks (BNs) find widespread application in many real-world probabilistic problems including diagnostics, forecasting, computer vision, etc. The basic computing primitive for the implementation of BNs through stochastic computing is a stochastic bit (s-bit) generator that can control the probability of obtaining ‘1’ in a binary bit-stream. While silicon-based complementary metal-oxide-semiconductor (CMOS) technology has been used for hardware implementation of BNs in the past, the lack of inherent stochasticity makes it area and energy inefficient.
With the emergence of the internet of things, the risk of information loss or security threat heightens. Conventional software crypto modules are powerful, but consume an enormous amount of energy, necessitating innovation in materials, devices, and architectures to produce next-generation secure low-energy electronics. Deriving inspiration from nature, we have demonstrated a low-power bioinspired crypto engine based on atomically thin multifunctional MoS2 memtransistors.
Project Summary: Materials composed of nitrogen-doped carbon are useful as catalyst supports due to their low cost, low density, and enhanced metal−support interaction. One way to synthesize catalytic single atoms and nuclei on these supports is via vapor phase deposition processes. Here, density functional theory (DFT) was used to evaluate the effects of N doping and oxidation of graphene on the adsorption and dissociation of trimethyl- (methylcyclopentadienyl) platinum (MeCpPtMe3), which is a commonly used precursor in vapor deposition of platinum.
Project summary: The electronic and optical properties of 2D materials can be strongly influenced by defects, some of which can find significant implementations, such as controllable doping, prolonged valley lifetime, and single-photon emissions.
Project summary: Transition metal dichalcogenides (TMDs) are seen as potential candidates for complementary metal oxide semiconductor (CMOS) technology in future nodes.
Project Summary: Magnetism in quantum materials creates a fertile ground for the exploration of fundamental spin-based phenomena, with applications in spintronics, magnetic memory, and quantum information technology. This is exemplified by the recent development of magnetic topological materials.