Noninvasive optoacoustic emitters for neuromodulation1. Demonstrated first non-invasive neuromodulation device with sub-millimeter spatial resolution,and high neural stimulation efficiency without biological damages.2. Fabricated optically-driven focused ultrasound emitter with polymeric organosilicon compoundsPDMS and candle soot.3. Performed numerical simulations with k-wave toolbox in MATLAB for acoustic field design.4. Collaborated with 2 co-first authors with different background to deliver interdisciplinary projects.5. Mentored 6 Ph.D./master/undergraduate students from 3 departments.Microwave thermoacoustic split ring resonator for neuromodulation 1. Simulated the electromagnetic field with COMSOL for resonator design.2. Characterized resonator with thermal camera and RF relevant devices: microwave signal generator,power amplifier, waveguide, oscilloscope, function generator, and delay generator.3. Recorded and processed electrophysiological signals with MATLAB.4. Attained wireless, battery-free, split ring resonator to harvest microwave energy and to convert itto ultrasound for neuromodulation.5. Communicated with microwave experts about the geometric design and characterizations ofresonator.

Advanced Soft Electrodes to Map the Brain Activity1. Developed transparent nanomesh microelectrode arrays and succeeded its usage of simultaneouselectrophysiological recording and two-photon imaging in brain.2. Measured electrochemical impedance of arrays.3. Assembled device by spin-coating, soft/hard baking, and soldering.4. Processed arrays with plasma etching and E-beam evaporation deposition.

Enhanced Thermoelectric Properties of n-type Bi2O2Se by Sb-doping at Bi site1. Enhanced figure of merit (ZT) of thermoelectric ceramic Bi2O2Se by doping.2. Fabricated ceramic samples by solid-state reaction and spark plasma sintering.3. Characterized ceramic samples by SEM, XRD, XPS, ZEM.4. Presented experiment results to project leader.

Preparation of Prussian blue Electrochromic Film by Spin Coating1.Independently designed the experiment to optimize the parameter of synthesis, concentration of reactants, temperature, rotating speed for spin coating and ratio for Prussian blue electrochromic film.