A5058626111- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Materials and Mechanics
- Advanced Sensor and Energy Harvesting Materials
- Non-Invasive Vital Sign Monitoring
- Optical Imaging and Spectroscopy Techniques
- Conducting polymers and applications
- Photoacoustic and Ultrasonic Imaging
- Ultrasound Imaging and Elastography
- Organic Electronics and Photovoltaics
- Hemodynamic Monitoring and Therapy
- Advanced Photocatalysis Techniques
- Solar Thermal and Photovoltaic Systems
- Electrical and Bioimpedance Tomography
- Thermal Radiation and Cooling Technologies
- Ultrasound and Hyperthermia Applications
- Soft Robotics and Applications
- Laser-Ablation Synthesis of Nanoparticles
- solar cell performance optimization
- Nanocluster Synthesis and Applications
- Muscle activation and electromyography studies
- Photonic Crystals and Applications
- Spinal Fractures and Fixation Techniques
- Molecular Junctions and Nanostructures
University of California, San Diego
2021-2024
Johns Hopkins University
2019-2024
Wuhan National Laboratory for Optoelectronics
2020
Huazhong University of Science and Technology
2018-2020
Abstract Continuous imaging of cardiac functions is highly desirable for the assessment long-term cardiovascular health, detection acute dysfunction and clinical management critically ill or surgical patients 1–4 . However, conventional non-invasive approaches to image function cannot provide continuous measurements owing device bulkiness 5–11 , existing wearable devices can only capture signals on skin 12–16 Here we report a ultrasonic continuous, real-time direct assessment. We introduce...
Serial assessment of the biomechanical properties tissues can be used to aid early detection and management pathophysiological conditions, track evolution lesions evaluate progress rehabilitation. However, current methods are invasive, only for short-term measurements, or have insufficient penetration depth spatial resolution. Here we describe a stretchable ultrasonic array performing serial non-invasive elastographic measurements up 4 cm beneath skin at resolution 0.5 mm. The conforms human...
Abstract Electronic patches, based on various mechanisms, allow continuous and noninvasive monitoring of biomolecules the skin surface. However, to date, such devices are unable sense in deep tissues, which have a stronger faster correlation with human physiological status than those Here, we demonstrate photoacoustic patch for three-dimensional (3D) mapping hemoglobin tissues. This integrates an array ultrasonic transducers vertical-cavity surface-emitting laser (VCSEL) diodes common soft...
The precise placement of semiconductor nanowires (NWs) into two- or three-dimensional (2D/3D) micro-/nanoarchitectures is a key for the construction integrated functional devices. However, long-pending challenges still exist in high-resolution 3D assembly NWs. Here, we have achieved directional zinc oxide (ZnO) NWs nearly arbitrary architectures with high spatial resolution using two-photon polymerization. can regularly align any desired direction along laser scanning pathway. Through...
This review highlights recent advancements in the zinc oxide electron transport layer for PbS colloidal quantum dot solar cells.
Rapid fabricating and harnessing stimuli-responsive behaviors of microscale bio-compatible hydrogels are great interest to the emerging micro-mechanics, drug delivery, artificial scaffolds, nano-robotics, lab chips. Herein, we demonstrate a novel femtosecond laser additive manufacturing process with smart materials for soft interactive hydrogel micro-machines. Bio-compatible hyaluronic acid methacryloyl was polymerized hydrophilic diacrylate into an absorbent matrix under tight topological...
Colloidal quantum dot (CQD) solar cells have benefited from rapidly rising single-junction efficiencies in recent years and shown promise multijunction color-tuned applications. However, within the context of next-generation cells, CQD photovoltaics still an efficiency deficit compared to mature technologies. Here, we use one-dimensional optoelectronic cell simulations show that much this highest-performing PbS can be attributed hole transport layer (HTL). We find increasing both doping...
In this paper, a neoteric algorithm based on two-dimensional continuous wavelet transform is developed to get the defect contour in terahertz (THz) non-destructive testing result obtained from raster-scan frequency-modulated continuous-wave (FMCW) THz imaging system. order prove method's validity, an experiment carried out. The of shows that method allows one extract FMCW interference with severe stripe noises. Moreover, relative error area between actual value and extracted no more than...
Mimicking natural botanical/zoological systems has revolutionarily inspired four-dimensional (4D) hydrogel robotics, interactive actuators/machines, automatic biomedical devices, and self-adaptive photonics. The controllable high-freedom shape reconfiguration holds the key to satisfying ever-increasing demands. However, miniaturized biocompatible 4D hydrogels remain rigorously stifled due current approach/material limits. In this research, we spatiotemporally program micro/nano (μ/n) through...
Abstract Semiconductive hydrogels denote a strategically valuable platform associated with interdiscipline fields by double advantages of metals and organisms (eco‐friendliness, structural flexibility, mixed conduction, real‐time responsiveness, scalable fabrication, chemical stability). Nevertheless, the orthodox chemical/physical methods processing yield planar‐like layers or rough structures without ultrafine feature size manipulative performance, falling short µ‐robotics, µ‐electronics,...
We synthesized highly branched and electron-donating side chain subunits attached them to polystyrene (PS) used as a dielectric layer in pentacene field-effect transistor. The influence of these groups on function, charge retention, threshold voltage shifts (ΔVth) depending their positions multilayers was determined. compared the observations made an N-perphenylated iminobisaniline with those from same chains modified ZnO nanoparticles adduct formed tetracyanoethylene (TCNE). also analogue...
Abstract Electronic patches, based on various mechanisms, allow continuous and noninvasive monitoring of biomolecules the skin surface. However, to date, such devices have been unable sense in deep tissues, which a stronger faster correlation with human physiological status. Here, we demonstrate photoacoustic patch for three-dimensional (3D) mapping hemoglobin tissues. This integrates an array ultrasonic transducers vertical-cavity surface-emitting laser (VCSEL) diodes common soft substrate....
Colloidal Quantum Dot (CQD) thin films are advantageous for solar energy generation because of their low-cost and size-tunable, solution-processable nature. However, efficiency in cells is limited part by the performance hole transport layer (HTL). Through Solar Cell Capacitance Simulations Transfer Matrix Method calculations, we show that significant photogeneration occurs standard HTL ethanedithiol-passivated lead sulfide CQDs which a problem due to sub-optimal carrier mobility this...
Colloidal quantum dots are a promising candidate material for thin film solar cells due to their size-dependent band gap tunability and solution-based processing flexibility. Spray-casting technology has the potential reduce strict environmental requirements associated with traditional fabrication procedures colloidal dot cells, potentially enabling installation-site cell fabrication. Here, we demonstrate spray-casting of silver nanowire electrodes zinc oxide electron transport layers, use...
Solar technology candidates for building‐integrated photovoltaics and mobile power applications suffer from difficulty in fabricating large‐area, defect‐free solar cells, high materials costs, small angular acceptance incoming radiation. concentrators collecting non‐normal‐incidence radiation diffuse light while retaining concentration ratios are therefore an enticing high‐efficiency‐low‐cost photovoltaic systems. Here, a novel implementation of dielectric total internal reflection (DTIRCs)...
Colloidal quantum dots (CQDs) are promising materials for photovoltaic applications due to their solution processibility and size-dependent band gap tunability. The electron transport layer (ETL) is an important component of PbS CQD solar cells, the quality zinc oxide nanoparticle (ZnO NP) ETL film significantly impacts both power conversion efficiency (PCE) fabrication yield cells. We report on multiple methods improve ZnO NP films demonstrate increased PCE device in standard cells...
Abstract Large colloidal quantum dots of PbSe (first excitonic peak position >2 µm) are synthesized under different conditions temperature, the concentration precursors and their ratio, oleic acid diphenylphosphine. The dependence optical properties, grain size dispersity, process yield on processing is systematically explored discussed. Ostwald ripening how it affects growth demonstrated. Finally, results for absorption wavelength diameter large nanocrystals compared to relationships...