Xiao Xiao

Xiao Xiao
National University of Singapore | NUS · Department of Electrical & Computer Engineering

PhD

About

48
Publications
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861
Citations

Publications

Publications (48)
Article
Full-text available
Electronic textiles (e-textiles), having the capability of interacting with the human body and surroundings, are changing our everyday life in fundamental and meaningful ways. Yet, the expansion of the field of e-textiles is still limited by the lack of stable and biocompatible power sources with aesthetic designs. Here, we report a recharge-able s...
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Continuously and accurately monitoring the pulse wave signals is critical to prevent and diagnose cardiovascular diseases. However, existing wearable pulse sensors are vulnerable to motion artifacts due to the lack of proper adhesion and conformal interface with human skin during body movement. Here, a highly sensitive and conformal pressure sensor...
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An expanding elderly population and people with disabilities pose considerable challenges to the current healthcare system. As a practical technology that integrates systems and services, assistive physical therapy devices are essential to maintain or to improve an individual's functioning and independence, thus promoting their well-being. Given te...
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The smart textile research community is advancing rapidly with the aim of changing the way we wear clothes in the near future. An eardrum-inspired acoustic textile was recently developed that can function as a sensitive audible microphone. The acoustic textile is woven from yarns with a high Young’s modulus and thermal drawing composite piezoelectr...
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Dr. Jun Chen is currently an assistant professor in the Department of Bioengineering at the University of California, Los Angeles. His current research focuses on nanotechnology and bioelectronics for energy, sensing, and therapeutic applications in the form of smart textiles, wearables, and body area networks. With a current h-index of 85, he has...
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Wearable respiratory monitoring is a fast, non‐invasive, and convenient approach to provide early recognition of human health abnormalities like restrictive and obstructive lung diseases. Here, a computational fluid dynamics assisted on‐mask sensor network is reported, which can overcome different user facial contours and environmental interference...
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Infants are physically vulnerable and cannot express their feelings. Continuous monitoring and measuring the biomechanical pressure to which an infant body is exposed remains critical to avoid infant injury and illness. Here, a body area sensor network comprising edible triboelectric hydrogel sensors for all‐around infant motion monitoring is repor...
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Cardiovascular diseases remain the leading cause of death worldwide. The rapid development of flexible sensing technologies and wearable pulse pressure sensors have attracted keen research interest and have been widely used for long-term and real-time cardiovascular status monitoring. Owing to their compelling characteristics, including light weigh...
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Bubbles play a crucial role in multidisciplinary industrial applications, e.g., heat transfer and mass transfer. However, existing methods to manipulate bubbles still face many challenges, such as buoyancy inhibition, hydrostatic pressure, gas dissolving, easy deformability, and so on. To circumvent these constraints, here we develop a bioinspired...
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Graphene oxide (GO), a derivative of graphene, is a novel carbon material that has attracted a lot of attention in the field of membrane materials as its ability to achieve layer-by-layer stacking and the formation of nanochannels between the lamellae makes it excellent for selective separation of substances. In this paper, the separation mechanism...
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Fiber‐based electronics technology has been making significant strides towards applicable emergence into many fields. Here, we report the use of stretchable styrene‐ethylene‐butylene‐styrene (SEBS) fibers as a conductive substrate to simultaneously load Au nanowire and Prussian blue (PB) as biosensing interfaces. Accordingly, due to the synergistic...
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With air pollution increasing around 75 percent in the past 30 years, 80 percent of the globe’s wasted water flowing into Earth’s oceans and rivers untreated, and more than 22 million hectares of polluted soil, a more effective, efficient, and self-sufficient chemical sensor is needed to recognize, and in some cases, treat these pollutants. Current...
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Communication and interaction with machines are changing our ways of life. However, developing an acoustic interface that simultaneously features waterproofness, wearability, high fidelity, and high accuracy for human–machine interaction remains a grand challenge. Herein, a waterproof acoustic sensor (WAS) as a wearable translation interface to com...
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Dual-band electrochromism is a phenomenon where materials can independently regulate the transmittance of visible (VIS) and near-infrared (NIR) light. Owing to their bistability, low energy consumption, and independent control over VIS and NIR regions, dual-band electrochromic (EC) devices have been of great significance to fully harnessing VIS and...
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Thermogalvanic hydrogels have been highlighted in the design of flexible thermoelectric cells and sensors on account of their excellent physicochemical properties such as high thermal sensitivity, stretchability, and portability. However,...
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The world is experiencing the third wave of electronic commerce, in which battery-free electronics dominate the market share. Additionally, the wide distribution of the sensors and high maintenance costs J o u r n a l P r e-p r o o f 2 make batteries an insufficient solution, especially for remote or inaccessible areas. Powering the IoT would be im...
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Physiological monitoring sensors have been critical in diagnosing and improving the healthcare industry over the past 30 years, despite various limitations regarding providing differences in signal outputs in response to the changes in the user's body. Four-dimensional (4D) printing has been established in less than a decade; therefore, it currentl...
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Camouflage techniques are an integral part of the natural world. Despite having developed many technological approaches, creating a solution which can simultaneously modulate its visible and infrared appearance remains a great challenge and highly desired. We present a moisture assisted photo-engineered textile that visually blends objects into the...
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Electrode microfabrication technologies such as lithography and deposition have been widely applied in wearable electronics to boost interfacial coupling efficiency and device performance. However, a majority of these approaches are restricted by expensive and complicated processing techniques, as well as waste discharge. Here, helium plasma irradi...
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Magnetoelastic effect characterizes the change of materials’ magnetic properties under mechanical deformation, which is conventionally observed in some rigid metals or metal alloys. Here we show magnetoelastic effect can also exist in 1D soft fibers with stronger magnetomechanical coupling than that in traditional rigid counterparts. This effect is...
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Over the last decade, in pursuit to provide suitable alternatives for power supplies of medical devices in regenerative medicine, extensive research on nanogenerators has been developed. Such devices can overcome current commercial battery challenges, including intense heat-on-body complications due to the electrical current during therapeutic usag...
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Electrical impedance spectroscopy (EIS) has been recognized to characterize oxidized low-density lipoprotein (oxLDL) in the metabolically active plaque. However, intravascular deployment of 3-D EIS-derived electrical impedance tomography (EIT) for endoluminal mapping of oxLDL-laden arterial walls remains an unmet clinical challenge. To this end, we...
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The efficient conversion of ultrasound into electrical energy remains a highly desirable wireless powering solution, with potentially profound ramifications in energy transfer across virtually all industrial fields, especially for implantable medical devices. Triboelectric nanogenerators have been shown to effectively carry out ultrasound energy tr...
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Recent advances in human-machine interface (HMI) lead to a renewed interest in creating intuitive and immersive interaction. Here, we designed a simple-structured and high-resolution bending angle triboelectric sensor named bending-angle triboelectric nanogenerator (BA-TENG) to construct a glove-based multi-dimensional HMI. With the assistance of a...
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Wound healing, one of the most complex processes in the human body, involves the spatial and temporal synchronization of a variety of cell types with distinct roles. Slow or nonhealing skin wounds have potentially life‐threatening consequences, ranging from infection to scar, clot, and hemorrhage. Recently, the advent of triboelectric nanogenerator...
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Cardiovascular diseases are currently the leading cause of death globally and are projected to remain the leading cause in 2040, making heart rate an important physiological indicator that should be regularly monitored. Current heart rate monitoring techniques, including photoplethysmography and electrocardiography, are inconvenient for continuous...
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Printed electronics are expected to facilitate the widespread distributed wearable electronics in the era of the Internet of things. However, developing cheap and stable electrode inks remains a significant challenge in the printed electronics industry and academic community. Here, overcoming the weak hydrophilicity of polyaniline, a low-cost, easy...
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A conformal, stretchable, and integrated epidermal patch is developed to simultaneously monitor biophysical and biochemical signals via an all-in-one design. Ultrasonic transducers are used to monitor cardiovascular status of blood pressure and heart rate from the carotid artery, and electrochemical sensors are used to detect biomarker levels of la...
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Triboelectric nanogenerators (TENGs) are able to convert low-frequency biomechanical motions into characteristically high-voltage and low-current electrical signals via a coupling of contact electrification and electrostatic induction. Resulting from a unique working principle, TENGs hold a collection of compelling features, including light weight,...
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Gas bubble manipulations in liquid have long been a concern because of their vital roles in various gas-related fields. To deal with the weakness in long-distance gas transportation of previous works, we took inspiration from the ridgelike structure on Nepenthes pitcher's peristome and successfully prepared a two-dimensional superaerophilic surface...
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Wearable triboelectric nanogenerators (W-TENGs) have triggered considerable attention in light of their broad and diverse biomedical applications, from biomonitoring to therapeutics. In this review, we summarize the use of W-TENGs for self-powered/self-administered therapeutic interventions, classifying them on the basis of materials chemistry, wor...
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Offshore oil spills, industrial oily wastewater, and domestic oil pollution are some of the most serious global challenges, leading environmental causes of morbidity and mortality. Nanofiber membrane materials manufactured via...
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Self-standing polystyrene nanotube (PNT) membranes have been fabricated from liquid deposition in the pores of anodic alumina. PNTs were deposited using 3 wt% concentration of 90 kDa polystyrene in the starting solution, followed by 2 h annealing in Argon. Initial polymer concentration, polymer molecular weight and annealing time were varied, and t...
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As the world marches into the era of the Internet of Things (IoT), the practice of human health care is on the cusp of a revolution, driven by an unprecedented level of personalization enabled by a variety of wearable bioelectronics. A sustainable and wearable energy solution is highly desired , but challenges still remain in its development. Here,...
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Correction for ‘Efficient separation of immiscible oil/water mixtures using a perforated lotus leaf’ by Chunhui Zhang et al. , Green Chem. , 2019, 21 , 6579–6584.
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Ecosystem and human society are nowadays greatly threatened by oily wastewater or spilled oils. To address these severe issues, considerable advanced methods, such as polymer membrane and polymer-coated mesh with special wettability, have been developed to achieve efficient oil/water separation. However, single superhydrophobic- or superhydrophilic...
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Manipulating bubbles in surfactant solutions or oil mediums is of vital importance in daily life and industries concerning with cosmetics, food, fermentation, mineral flotation, etc. However, realizing controllable regulation of bubble’s behavior is quite challenging in low-surface-tension aqueous environment, which is mainly attributed to the stro...
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Bio-surfaces with geometry-gradient structures or special wettabilities demonstrate intriguing performance in manipulating the behaviors of versatile fluids. By mimicking natural species, i.e., the cactus spine with a shape-gradient morphology and the Picher plant with a lubricated inner surface, we have successfully prepared an asymmetric slippery...

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Projects (2)
Project
Wearable bioelectronics
Project
Nature-inspired biongineering