Kewen Pan

Kewen Pan
The University of Manchester · School of Electrical and Electronic Engineering

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34
Publications
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441
Citations

Publications

Publications (34)
Article
Full-text available
To date semiconductor switches are still the main enablers for electrical circuit and system reconfigurability. They however not only consume dynamic power but also dissipate static powers, the former for performing on/off operation and latter for holding on/off state. These semiconductor devices are volatile and not energy efficient due to the nee...
Article
Screen-printed graphene is integrated with multiple-input multiple-output (MIMO) technology to conquer the most concerned surge in electronic waste caused by the mass deployment of Internet of things (IoT) applications. A flexible MIMO antenna is implemented with simple fabrication process suitable for large-scale production by screen printing grap...
Article
Current artificial magnetic conductor (AMC) designs use metallic patterns on rigid substrates and focus on shapes and sizes of AMC structures, rather than on material performance, which has hindered operation bandwidth and design flexibility. Here, we introduce printed graphene AMC-based broadband and flexible microwave radar absorbers, which not o...
Article
Full-text available
Conductive thin films are an essential component of many electronic devices. Measuring their conductivity accurately is necessary for quality control and process monitoring. We compare conductivity measurements on films for flexible electronics using three different techniques: four-point probe, microwave resonator and terahertz time-domain spectro...
Article
Full-text available
In this work, we first screen print thin GO laminates on Kapton film and then chemically reduce to rGO with desired sheet resistance by controlling printing cycles and reduction time. The thin rGO laminates have a wide range of conductivity from 2.8 S m⁻¹ up to 1.3×10⁴ S m⁻¹, exhibiting excellent consistency of electric performance even after 50000...
Article
Full-text available
Screen-printed graphene near field communication (NFC) tag antenna is integrated with inkjet-printed WS2 photodetector on paper substrate to fabricate battery-free wireless photosensor. A sequential multi-stack printing is employed for the wireless photosensor fabrication: the NFC tag antenna is first screen-printed with graphene conductive ink and...
Article
Ultrafine particulate aerosols less than 100 nm diffuse randomly in the air and are hazardous to the environment and human health. However, no technical standards nor commercial products apply for filtering particle sizes under 100 nm yet. Here we report the development of a porous poly(L-lactic acid) (PLLA) nano-fibrous membrane filter with an ult...
Article
In this study, we demonstrate sustainable conductive screen printing ink containing graphite nanoplates (GNP) prepared by means of combining shear and ultrasonication exfoliation processes with the aid of mixed-solvent strategy of isopropanol (IPA)-water mixtures. The screen printed GNP ink features high conductivity of 4.66×10⁴ S/m, green and low...
Article
Near Field Communication (NFC) is a short-range wireless communication technique that has become attractive devices for healthcare and wellbeing monitoring. The work reported here demonstrates the development of a battery free wearable sensing system with temperature and sweat sensors embedded into and powered by a smart textile NFC antenna. The NF...
Article
A paraffin microsphere-templated 3D porous EcoFlex sponge was prepared to selectively absorb oil or chemicals from water. The technology for producing this EcoFlex sponge does not need complicated synthesis processes or instruments, and materials applied in this work are eco-friendly. Therefore, this sponge can be employed in environmental field. E...
Article
Stretchable microfluidic sensors have recently been developed and employed in many sensing applications. However, they are still in their early stage of development and facing considerable challenges, such as practical system integration due to the limitation of costs, wired connections and sensitivity. In this work, we present a compact soft wirel...
Article
Full-text available
Wearable e-textile near-field communication (NFC) radio-frequency identification (RFID) antennas fully integrated with garments using embroidery techniques, which enables everyday clothing to become connective to wireless communication systems, is presented. The e-textile wearable antennas have been designed through full electromagnetic wave simula...
Article
Full-text available
Printed electronics offer a breakthrough in the penetration of information technology into everyday life. The possibility of printing electronic circuits will further promote the spread of the Internet of Things applications. Inks based on graphene have a chance to dominate this technology, as they potentially can be low cost and applied directly o...
Article
Full-text available
Increasing amounts of attention are being paid to the study of Soft Sensors and Soft Systems. Soft Robotic Systems require input from advances in the field of Soft Sensors. Soft sensors can help a soft robot to perceive and to act upon its immediate environment. The concept of integrating sensing capabilities into soft robotic systems is becoming i...
Chapter
Full-text available
Defect detection is an emerging field in SHM, which not only reduces costs by minimizing maintenance and inspection cycles, but also prevents catastrophic failures at an earlier stage. As a non-destructive evaluation method, the well-known Lamb wave-based defect detection and localization approach has been widely used in SHM. Due to its unique feat...
Article
Full-text available
In this work, we have designed, fabricated and experimentally characterized a printed graphene nano-flakes enabled flexible and conformable wideband radar absorber. The absorber covers both X (8–12 GHz) and Ku (12–18 GHz) bands and is printed on flexible substrate using graphene nano-flakes conductive ink through stencil printing method. The measur...
Conference Paper
Wireless Sensor Actuator Networks (WSANs) have shown its advantages of flexibility and cable-free deployment in industrial applications. However, the sensors explore directly to the harsh environment and are the most prone to faults and malfunctioning, which poses a big challenge to the WSAN's applicability in applications with high safety requirem...

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