Journal Article 12038-63-0 2D van der Waals layered materials 7440-15-5 Rhenium Sulfides artificial optoelectronic synapses brain-inspired computing convolutional neural networks crystallization device uniformity flexible artificial synapses flow patterns machine learning microfluidics multi-valued logic computing negative-differential-resistance organic transistors persistent photoconductivity effect phase separation reconfigurable devices and circuits rhenium disulfide rhenium sulfide solution shearing ternary devices and circuits thin films thin-films van der Waals layered materials