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Laser-Induced Graphene:En Route to Smart Sensing

Nano-Micro Letters 2020年第11期12卷 209-225页

作者： Libei Huang Jianjun Su Yun Song Ruquan Ye Department of Chemistry City University of Hong KongKowloonHong KongPeople’s Republic of China State Key Lab of Marine Pollution City University of Hong KongKowloonHong KongPeople’s Republic of China

The discovery of laser-induced graphene(LIG) from polymers in 2014 has aroused much attention in recent years.A broad range of applications,including batteries,catalysis,sterilization,and separation,have been *** advantages of LIG technology over conventional graphene synthesis methods are conspicuous,which include designable patterning,environmental friendliness,tunable compositions,and controllable *** addition,LIG possesses high porosity,great flexibility,and mechanical robustness,and excellent electric and thermal *** patternable and printable manufacturing process and the advantageous properties of LIG illuminate a new pathway for developing miniaturized graphene *** use in sensing applications has grown swiftly from a single detection component to an integrated smart detection *** this minireview,we start with the introduction of synthetic efforts related to the fabrication of LIG ***,we highlight the achievement of LIG sensors for the detection of a diversity of stimuli with a focus on the design principle and working *** development of the techniques toward in situ and smart detection of multiple stimuli in widespread applications will be discussed.

关键词： Laser-induced graphene Smart sensor printable electronics Design principle

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Current advancements on charge selective contact interfacial layers and electrodes in flexible hybrid perovskite photovoltaics

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Journal of Energy Chemistry 2021年第3期30卷 151-173页

作者： Gopalan Saianand Prashant Sonar Gregory J.Wilson Anantha-Iyengar Gopalan Vellaisamy A.L.Roy Gautam E.Unni Khan Mamun Reza Behzad Bahrami K.Venkatramanan Qiquan Qiao Global Centre for Environmental Remediation(CCER) Faculty of ScienceThe University of NewcastleCallaghan 2308New South WalesAustralia CSIRO Energy Newcastle Energy Centre10 Murray Dwyer CctMayfield WestNSW 2304Australia School of Chemistry and Physics Queensland University of Technology(QUT)2 George StreetBrisbaneQLD 4001Australia Centre for Material Science Queensland University of Technology(QUT)BrisbaneQLD 4000Australia Daegyeong Regional Infrastructure Technology Development Center Kyungpook National UniversityDaegu 41566Republic of Korea James Watt School of Engineering University of GlasgowG128QQUnited Kingdom Facufty of Engineering and Built Environment The University of NewcastleCallaghan 2308New South WalesAustralia Department of Electrical Engineering Center for Advanced PhotovoltaicsSouth Dakota State UniversityBrookings 57007South DakotaUSA Department of Physics SCSVMV Deemed UniversityKanchipuram 631561Tamil NaduIndia

Perovskite-based photovoltaic materials have been attracting attention for their strikingly improved performance at converting sunlight into *** beneficial and unique optoelectronic characteristics of perovskite structures enable researchers to achieve an incredibly remarkable power conversion *** hybrid perovskite photovoltaics promise emerging applications in a myriad of optoelectronic and wearable/portable device applications owing to their inherent intriguing physicochemical and photophysical properties which enabled researchers to take forward advanced research in this growing *** perovskite photovoltaics have attracted significant attention owing to their fascinating material properties with combined merits of high efficiency,light-weight,flexibility,semitransparency,compatibility towards roll-to-roll printing,and large-area mass-scale *** perovskite-based solar cells comprise of 4 key components that include a flexible substrate,semi-transparent bottom contact electrode,perovskite(light absorber layer)and charge transport(electron/hole)layers and top(usually metal)*** these components,interfacial layers and contact electrodes play a pivotal role in influencing the overall photovoltaic *** this comprehensive review article,we focus on the current developments and latest progress achieved in perovskite photovoltaics concerning the charge selective transport layers/electrodes toward the fabrication of highly stable,efficient flexible *** a concluding remark,we briefly summarize the highlights of the review article and make recommendations for future outlook and investigation with perspectives on the perovskite-based optoelectronic functional devices that can be potentially utilized in smart wearable and portable devices.

关键词： Perovskite photovoltaics Charge transport layers Contact interface layer Contact electrodes printable electronics

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A low-cost, printable, and stretchable strain sensor based on highly conductive elastic composites with tunable sensitivity for human motion monitoring

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Nano Research 2018年第4期11卷 1938-1955页

作者： Yougen Hu Tao Zhao Pengli Zhu Yuan Zhang Xianwen Liang Rong Sun Ching-Ping Wong Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packaging Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China Nano Science and Technology Institute University of Science and Technology of China Suzhou 215123 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA Department of Electronic Engineering The Chinese University ofHong Kong Hong Kong 999077 China

Strain sensors with high stretchability, broad strain range, high sensitivity, and good reliability are desirable, owing to their promising applications in electronic skins and human motion monitoring systems. In this paper, we report a high- performance strain sensor based on printable and stretchable electrically con- ductive elastic composites. This strain sensor is fabricated by mixing silver-coated polystyrene spheres （PS@Ag） and liquid polydimethylsiloxane （PDMS） and screen-printed to a desirable geometry. The strain sensor exhibits fascinating comprehensive performances, including high electrical conductivity （1.65 × 104 S/m）, large workable strain range （〉 80%）, high sensitivity （gauge factor of 17.5 in strain of 0%-10%, 6.0 in strain of 10%-60% and 78.6 in strain of 60%-80%）, inconspicuous resistance overshoot （〈 15%）, good reproducibility and excellent long-term stability （1,750 h at 85℃/85% relative humidity） for PS@Ag/PDMS-60, which only contains - 36.7 wt.% of silver. Simultaneously, this strain sensor provides the advantages of low-cost, simple, and large-area scalable fabrication, as well as robust mechanical properties and versatility in applications. Based on these performance characteristics, its applications in flexible printed electrodes and monitoring vigorous human motions are demonstrated, revealing its tremendous potential for applications in flexible and wearable electronics.

关键词： flexible strain sensor printable electronics human motion monitoring conductive elastic composites silver-coated polymer spheres

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High-precision transfer-printing and integration of vertically oriented semiconductor arrays for flexible device fabrication

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Nano Research 2014年第7期7卷 998-1006页

作者： Mark Triplett Hideki Nishimura Matthew Ombaba V. J. Logeeswarren Matthew Yee Kazim G. Polat Jin Y. Oh Takashi Fuyuki Francois Leonard M. Saif Islam Center for Nano and Micro Manufacturing and Department of Electrical and Computer Engineering University of California Davis CA 95616 USA Department of Physics University of California Davis CA 95515 USA Sandia National Laboratories Livermore CA 94551 USA Microelectronic Device Science Laboratory Nara Institute of Science and Technology Japan

Flexible electronics utilizing single crystalline semiconductors typically require post-growth processes to assemble and incorporate the crystalline materials onto flexible substrates. Here we present a high-precision transfer-printing method for vertical arrays of single crystalline semiconductor materials with widely varying aspect ratios and densities enabling the assembly of arrays on flexible substrates in a vertical fashion. Complementary fabrication processes for integrating transferred arrays into flexible devices are also presented and characterized. Robust contacts to transferred silicon wire arrays are demonstrated and shown to be stable under flexing stress down to bending radii of 20 mm. The fabricated devices exhibit a reversible tactile response enabling silicon based, nonpiezoelectric, and flexible tactile sensors. The presented system leads the way towards high-throughput, manufacturable, and scalable fabrication of flexible devices.

关键词： transfer printing nanowires flexible electronics printable electronics nanoscale devices

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