Wearable electronics have great potential in enhancing health monitoring, disease diagnosis, and environmental pollution tracking. Development of wearable surface-enhanced Raman spectroscopy (SERS) substrates with target sampling and sensitive sensing functions is a promising way to obtain physical and chemical information. This study describes a facile and effective approach for constructing an electrically modulated SERS (E-SERS) substrate as a wearable and wireless battery-free substrate with improved sensitivity. By integrating zinc oxide nanorods (ZnO NRs) with asymmetric gold decoration, controllable enhanced piezoelectric potentials were achieved using magnets to supply the adjustable pressure force. Owing to spatially oriented electron-hole pair separation on the asymmetric NRs, the local hotspot intensity at the Au tips is significantly improved, increasing the SERS signal by 6.7 times. This mechanism was quantitatively analyzed using Raman spectra by formation of Prussian blue (PB). As a proof-of-concept, the E-SERS substrate was further used as a wearable flexible device to directly collect the sweat on a runner's skin and then monitor the lactate status of the runner. This study offers new insight into the development of E-SERS substrates and provides new design options for the construction of wearable sampling and sensing devices for the noninvasive monitoring of metabolites in healthcare and biomedical fields.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.analchem.1c01723 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Wireless microwave-to-optical conversion via programmable metasurface without DC supply.
Nat Commun
January 2025
State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, China.
Microwave-optical interaction and its effective utilization are vital technologies at the frontier of classical and quantum sciences for communication, sensing, and imaging. Typically, state-of-the-art microwave-to-optical converters are realized by fiber and circuit approaches with multiple processing steps, and external powers are necessary, which leads to many limitations. Here, we propose a programmable metasurface that can achieve direct and high-speed free-space microwave-to-laser conversion.
View Article and Find Full Text PDFAdvancements in Passive Wireless Sensing Systems in Monitoring Harsh Environment and Healthcare Applications.
Nanomicro Lett
January 2025
RFIC Bio Centre, Kwangwoon University, Seoul, 01897, South Korea.
Recent advancements in passive wireless sensor technology have significantly extended the application scope of sensing, particularly in challenging environments for monitoring industry and healthcare applications. These systems are equipped with battery-free operation, wireless connectivity, and are designed to be both miniaturized and lightweight. Such features enable the safe, real-time monitoring of industrial environments and support high-precision physiological measurements in confined internal body spaces and on wearable epidermal devices.
View Article and Find Full Text PDFAn esophageal stent integrated with wireless battery-free movable photodynamic-therapy unit for targeted tumor treatment.
Mater Today Bio
February 2025
Department of Radiation Oncology, Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, 610041, China.
Article Synopsis
- Esophageal cancer ranks as the eighth most common type of cancer globally and is the sixth leading cause of cancer-related deaths.
- The study introduces an innovative esophageal stent that features a wireless, battery-free, movable photodynamic therapy (PDT) unit, designed for flexible and precise treatment of esophageal tumors.
- The system integrates a light source for PDT to induce tumor cell death and an electrochemical pneumatic actuator that allows for real-time positioning of the light source, improving targeted therapy based on tumor progression.
Digitally-defined ultrathin transparent wireless sensor network for room-scale imperceptible ambient intelligence.
Npj Flex Electron
February 2024
Institute for Health Innovation and Technology, National University of Singapore, Singapore 117599, Singapore.
Wireless and battery-free radio-frequency (RF) sensors can be used to create physical spaces that ambiently sense and respond to human activities. Making such sensors ultra-flexible and transparent is important to preserve the aesthetics of living environments, accommodate daily activities, and functionally integrate with objects. However, existing RF sensors are unable to simultaneously achieve high transparency, flexibility, and the electrical conductivity required for remote room-scale operation.
View Article and Find Full Text PDFAdaptive wireless-powered network based on CNN near-field positioning by a dual-band metasurface.
Nat Commun
November 2024
Institute of Electromagnetic Space and the State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China.
With the improvement of industry, the connectivity of electronic devices gradually shift from wired to wireless. As a solution for power delivery, the non-contact power transfer holds promising ways to charge for moving terminals, enabling battery-free sensing, processing, and communication. Based on a dual-band metasurface, this study proposes an adaptive wireless-powered network (AWPN) to realize the simultaneous wireless localization and non-contact power supply.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!