ORCID Profile
0000-0002-3312-1664
Current Organisation
Nanyang Technological University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Springer Science and Business Media LLC
Date: 08-06-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00351A
Publisher: Wiley
Date: 03-06-2011
Publisher: American Chemical Society (ACS)
Date: 21-12-2011
DOI: 10.1021/NN2024557
Abstract: A new phototransistor based on the mechanically exfoliated single-layer MoS(2) nanosheet is fabricated, and its light-induced electric properties are investigated in detail. Photocurrent generated from the phototransistor is solely determined by the illuminated optical power at a constant drain or gate voltage. The switching behavior of photocurrent generation and annihilation can be completely finished within ca. 50 ms, and it shows good stability. Especially, the single-layer MoS(2) phototransistor exhibits a better photoresponsivity as compared with the graphene-based device. The unique characteristics of incident-light control, prompt photoswitching, and good photoresponsivity from the MoS(2) phototransistor pave an avenue to develop the single-layer semiconducting materials for multifunctional optoelectronic device applications in the future.
Publisher: American Chemical Society (ACS)
Date: 31-03-2020
Publisher: IOP Publishing
Date: 23-03-2011
DOI: 10.1088/0957-4484/22/19/195706
Abstract: Multifunctional single crystalline tin-doped indium oxide (ITO) nanowires with tuned Sn doping levels are synthesized via a vapor transport method. The Sn concentration in the nanowires can reach 6.4 at.% at a synthesis temperature of 840 °C, significantly exceeding the Sn solubility in ITO bulks grown at comparable temperatures, which we attribute to the unique feature of the vapor-liquid-solid growth. As a promising transparent conducting oxide nanomaterial, layers of these ITO nanowires exhibit a sheet resistance as low as 6.4 Ω/[Symbol: see text] and measurements on in idual nanowires give a resistivity of 2.4 × 10(-4) Ω cm with an electron density up to 2.6 × 10(20) cm(-3), while the optical transmittance in the visible regime can reach ∼ 80%. Under the ultraviolet excitation the ITO nanowire s les emit blue light, which can be ascribed to transitions related to defect levels. Furthermore, a room temperature ultraviolet light emission is observed in these ITO nanowires for the first time, and the exciton-related radiative process is identified by using temperature-dependent photoluminescence measurements.
Publisher: Research Square Platform LLC
Date: 07-07-2023
DOI: 10.21203/RS.3.RS-3078870/V1
Abstract: Continuous and in situ detection of biomarkers in biofluids (e.g., sweat) can provide critical health data but is limited by biofluids accessibility. Here, we report a sensor design that enables in situ detection of solid-state biomarkers ubiquitously present on human skin. We deploy an ionic-electronic bilayer hydrogel to facilitate the sequential dissolution, diffusion and electrochemical reaction of solid-state analytes. We demonstrate continuous monitoring of water-soluble analytes (i.e., solid lactate) and water-insoluble analytes (i.e., solid cholesterol) with ultralow detection limits of 0.51 nmol cm -2 and 0.26 nmol cm -2 , respectively. Additionally, the bilayer hydrogel electrochemical interface reduces motion artifacts by three times compared to conventional liquid-sensing electrochemical interfaces. In a clinical study, solid-state epidermal biomarkers measured by our stretchable wearable sensors showed a high correlation with biomarkers in human blood and dynamically correlated to physiological activities. These results present routes to universal platforms for biomarker monitoring without the need for biofluid acquisition.
Publisher: Wiley
Date: 17-05-2018
Abstract: Stretchable strain sensors, as the soft mechanical interface, provide the key mechanical information of the systems for healthcare monitoring, rehabilitation assistance, soft exoskeletal devices, and soft robotics. Stretchable strain sensors based on 2D flat film have been widely developed to monitor the in-plane force applied within the plane where the sensor is placed. However, to comprehensively obtain the mechanical feedback, the capability to detect the out-of-plane force, caused by the interaction outside of the plane where the senor is located, is needed. Herein, a 3D-structured stretchable strain sensor is reported to monitor the out-of-plane force by employing 3D printing in conjunction with out-of-plane capillary force-assisted self-pinning of carbon nanotubes. The 3D-structured sensor possesses large stretchability, multistrain detection, and strain-direction recognition by one single sensor. It is demonstrated that out-of-plane forces induced by the air/fluid flow are reliably monitored and intricate flow details are clearly recorded. The development opens up for the exploration of next-generation 3D stretchable sensors for electronic skin and soft robotics.
Publisher: Wiley
Date: 30-01-2013
Publisher: Wiley
Date: 29-05-2013
Abstract: Flexible, compact, ultrathin and all-solid-state micro-supercapacitors are prepared by coating H₃PO₄/PVA gel electrolyte onto micro-patterned rGO interdigitated electrodes prepared by combining photolithography with selective electrophoretic deposition.
Publisher: American Chemical Society (ACS)
Date: 04-10-2011
DOI: 10.1021/CG2007149
Publisher: Springer Science and Business Media LLC
Date: 21-11-2022
Publisher: Wiley
Date: 28-06-2013
Abstract: Urine for diagnostics: Urine, a "green" natural product, is used as an active component to produce a simple, inexpensive, and portable colorimetric Hg(2+) sensing assay with high selectivity and sensitivity by simply mixing gold nanoparticles (AuNPs) and urine. The synergetic effect of uric acid and creatinine decorated on AuNPs is the reason for selective binding of Hg(2+) , leading to the aggregation of gold nanoparticles and thereby causing a visible color change.
No related grants have been discovered for Xiaodong Chen.