Publications by authors named "Pingyuan Yan"
Reproducing neural functions with artificial nanofluidic systems has long been an aspirational goal for neuromorphic computing. In this study, neural functions, such as neural activation and synaptic plasticity, are successfully accomplished with a polarity-switchable nanofluidic memristor (PSNM), which is based on the anodized aluminum oxide (AAO) nanochannel array. The PSNM has unipolar memristive behavior at high electrolyte concentrations and bipolar memristive behavior at low electrolyte concentrations, which can emulate neural activation and synaptic plasticity, respectively.
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- The study investigates four types of 2D layered perovskites, focusing on their absorption and photoluminescence properties associated with different organic spacers (OAPbI, ODAPbI, BDAPbI, and (GA)MAPbI).
- It analyzes the average phonon energy and electron-phonon interaction strength in these materials, indicating that higher phonon energy corresponds to a stronger interaction involving more phonons.
- The findings reveal that different perovskite types exhibit varying dominant photoexcitations (excitons or polarons) based on the excitation energy, suggesting that organic spacers play a crucial role in optimizing electron-phonon interactions and improving optoelectronic properties
Highly robust, swiftly reversible thermochromic nature of a two-dimensional (2D) perovskite of (PDMA)(CHNH)PbI, nominally prepared as = 2 is found, where PDMA = CH(CHNH). A wide band gap variation from 700 to 430 nm is observed between room temperature and >60 °C under ambient conditions, resulting from moisture absorption and desorption. X-ray diffraction and Fourier-transform infrared spectroscopy are performed to analyze the hydrated and dehydrated states.
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