ADVANCED MATERIALS
·
2025
·
IF 26.8
Ge Mu,Xiaolong Zheng,Yimei Tan,Yanfei Liu,Qun Hao,Kangkang Weng,Xin Tang
Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 10 10 Jones, and the noise equivalent temperature difference ( NETD ) is as good as 25 mK up to 200 K.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Shuqin Yang,Zhilong Song,Naibo Gao,Zhixiang Hu,Licheng Zhou,Jingyao Liu,Baohui Zhang,Guangzu Zhang,Shenglin Jiang,Hua-Yao Li,Huan Liu
Indium oxide (In 2 O 3 ) nanomaterials have been investigated extensively as promising candidates for gas sensor applications. Here, we fabricate near room temperature operable H 2 S-sensitive gas sensors based on In 2 O 3 colloidal quantum dots (CQDs). Room-temperature film deposition of In 2 O 3 CQDs followed by surface ligand exchange treatment through Cu inorganic salts was employed to construct the sensor devices. Combined with a moderate annealing treatment, the long-chain ligands surrounding the quantum dot surfaces were completely removed to enhance gas adsorption and carrier transport, simultaneously resulting in the formation of CuO that may act as a catalytic promoter or form p-n heterojunction for selective H 2 S detection. The sensors exhibited high response up to 90 toward 5 ppm of H 2 S with response/recovery time of 72 s/200 s respectively, suggestive of a performance improvement compared to the In 2 O 3 -based H 2 S sensors reported in existing literature. The power law analysis indicated that the main oxygen species adsorbed on the surfaces were O 2 − and O − with the proportion of approximate 1:1 at near room temperature. The gas-sensing mechanism was attributed to the decisive role of surface states in determining the electrical conduction of quantum dot gas sensors.
研究领域:
材料科学
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传感器技术
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纳米科技
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Chong Li,Ran Tao,Jianlei Zhang,Jinlong Chen,Chen Fu,Jikai Zhang,Huiling Ong,Chenze Lu,Yi Chen,Qiang Wu,Jing-Ting Luo,Yongqing Fu
Along with the revolution of the Internet of Things (IoT), smart, flexible, easily fabricated, and highly sensitive gas sensors are essential for many portable electronics. In this study, a wearable NO2 sensor based on a nanomesh structure woven with Ti3C2Tx microflakes and Bi2S3 nanobelts operated at room temperature was successfully designed and prepared. The effects of the mass ratio between two materials on the performance were evaluated. Bi2S3 nanobelts embedded inside accordion-like Ti3C2Tx provide large specific surface areas and abundant active sites for the adsorption of NO2 molecules. Attributed to the high conductivity of Ti3C2Tx, the carriers generated in the sensitive layers are easily transmitted during sensing, thus significantly reducing the response and recovery times. The sensor based on the nanomesh containing 30 wt % Ti3C2Tx exhibits excellent sensing performance, fast response/recovery rates, and high stability even in arbitrary deformed shape conditions. Upon exposure to 1 ppm NO2, the response of the sensor is 12.67, and the response/recovery times are 5/28 s, respectively. A stable sensing performance can be maintained after 1500 cycles of deformation. This work demonstrates a simple but reliable manufacturing strategy of wearable gas sensors for the next generation of IoT monitoring network-linking human activities.
研究领域:
材料科学
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传感器技术
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物联网应用
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Lijiao Shen,Jue Cheng,Junying Zhang
Fast response dismantlable and reworkable adhesives with healable and high mechanical properties are highly desirable for real-world device applications, and light-induced reworkable adhesives instead of heat-responsive systems have always been of great interest for fast speed and ambient operation. Here, anthracene-based thiol-ene networks, potentially useful as UV-induced dismantlable and reworkable adhesives, were designed and prepared via [4π+4π] cycloaddition reaction, which is active enough to be fast and efficient stimulus–response by UV-light click reaction. The synthesis and cross-linking process were tracked with infrared spectra, which confirmed successfully obtaining the target monomer and polymer networks. The extent of decrosslinking and recrosslinking were monitored by DSC and UV–vis spectroscopy, and the recovery rate of recrosslinking was up to 90%. Optical microscopy (OM) was used to observe the scratch dimensions as well as healing capability, and the results showed that the reversible cycloaddition of anthracene endowed the network with excellent self-healing properties at room temperature. And, qualitative and quantitative measurements of the mechanical properties of this reworkable adhesive showed a shear strength of up to 3.45 MPa, as well as a re-bonding recovery rate by 80%. Anthracene-based adhesives are readily fast and efficient dismantlable and reworkable, suggesting encouraging potential for degradable and re-bondable photoresists in the electronics industry and other related fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Yangyang Huo,Limin Qiu,Tianqi Wang,Hui Yu,Wenyuan Yang,Xiangting Dong,Ying Yang
The development of a portable, low-cost sensor capable of accurately detecting H2S gas in exhaled human breath at room temperature is highly anticipated in the fields of human health assessment and food spoilage evaluation. However, achieving outstanding gas sensing performance and applicability for flexible room-temperature operation with parts per billion H2S gas sensors still poses technical challenges. To address this issue, this study involves the in situ growth of MoS2 nanosheets on the surface of In2O3 fibers to construct a p–n heterojunction. The In2O3@MoS2-2 sensor exhibits a high response of 460.61 to 50 ppm of H2S gas at room temperature, which is 19.5 times higher than that of the pure In2O3 sensor and 322.1 times higher than that of pure MoS2. The In2O3@MoS2-2 also demonstrates a minimum detection limit of 3 ppb and maintains a stable response to H2S gas even after being bent 50 times at a 60° angle. These exceptional gas sensing properties are attributed to the increase in oxygen vacancies and chemisorbed oxygen on In2O3@MoS2-2 nanofibers as well as the formation of the p–n heterojunction, which modulates the heterojunction barrier. Furthermore, in this study, we successfully applied the In2O3@MoS2-2 sensor for oral disease and detection of food spoilage conditions, thereby providing new design insights for the development of portable exhaled gas sensors and gas sensors for evaluating food spoilage conditions at room temperature.
研究领域:
材料科学
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生物医学工程
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化学传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 43
·2106352
·
IF 15.153
Fei Chen,Changxiang Guo,Honghao Zhou,Muhammad Wakil Shahzad,Terence Xiaoteng Liu,Sokolskyi Oleksandr,Jining Sun,Sheng Dai,Ben Bin Xu
Polymer-based solid electrolytes (PSEs) offer great promise in developing lithium metal batteries due to their attractive features such as safety, light weight, low cost, and high processability. However, a PSE-based lithium battery usually requires a relatively high temperature (60 °C or above) to complete charge and discharge due to the poor ionic conductivity of PSEs. Herein, a gel polymer electrolytes (GPEs) film with a supramolecular network structure through a facile one-step photopolymerization is designed and developed. The crosslinked structure and quadruple hydrogen bonding fulfil the GPEs with high thermal stability and good mechanical property with a maximum tensile strain of 48%. The obtained GPEs possess a high ionic conductivity of 3.8 × 10 −3 S cm −1 at 25 ° C and a decomposition voltage ≥ 4.6 V (vs Li/Li + ). The cells assembled with LiFePO 4 cathode and Li anode, present an initial discharge specific capacity of 155.6 mAh g −1 and a good cycling efficiency with a capacity retention rate of 81.1% after 100 charges/discharge cycles at 0.1 C at ambient temperature. This work encompasses a route to develop high performance PSEs that can be operated at room temperature for future lithium metal batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Jingzhao Tian,Zhihua Zhao,Jiazhi Li,Wenqiang Qiao,Chengyu Jin
Ammonia (NH 3 ), with its characteristic pungent odor, serves as a key indicator of meat spoilage, necessitating reliable detection methods for the precise assessment of meat freshness. However, the practical application of existing NH 3 sensors is limited by bottlenecks such as insufficient selectivity, relatively low sensitivity, and high operating temperatures. This study successfully fabricated high-performance NH 3 gas sensors using La 2 Sn 2 O 7 nanoparticles prepared via a facile one-step hydrothermal synthesis method. Gas-sensing performance tests revealed that the sensor exhibits a significant response value of 4.52 towards 100 ppm NH 3 at room temperature, a low detection limit down to 1 ppm. Furthermore, the sensor demonstrated superior selectivity for NH 3 compared to common interfering gases, outstanding long-term stability, and high repeatability. The research combined microstructural characterization and electrical property analysis to deeply elucidate its gas-sensing mechanism. Finally, an NH 3 detection alarm prototype device integrated with the La 2 Sn 2 O 7 sensor was designed and validated. This device effectively identified the spoilage status of chicken, beef, and lamb. Experimental results confirmed that the sensor can reliably determine the initial stage of meat spoilage by capturing trace amounts of NH 3 released at the onset of decay. This study provides a promising room-temperature operable sensor solution for practical meat quality monitoring.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiqi Chen,Jinyong Hu,Pei Chen,Mengqi Yin,Fanpu Meng,Yong Zhang
Transition metal dichalcogenides (TMDs) have blazed a novel trail in the field of NO 2 gas detection owing to the unique photoelectric properties and prospective gas sensing performance especially working at low operating temperature. However, the incomplete recoverability and susceptibility to humidity at room temperature restrict the practical applications of TMDs-based gas sensors. Herein, we demonstrate a fully recoverable WS 2 based gas sensor with enhanced anti-humidity ability by combining the decoration of zero-dimensional PbS nanoparticles and the assistance of UV light. Through the control over the molar ratio of WS 2 /PbS, the optimized WS 2 /PbS (the molar is 10:1) gas sensor exhibits a remarkable elevated recovery rate from 33.4% to 99.8% with almost no baseline drift as compared to that in the pure WS 2 gas sensor. More importantly, attributing to the irradiation of UV can accelerate the desorption of water molecules, WS 2 /PbS heterostructure based gas sensor manifests more stabilized anti-humidity performance with stable initial resistance and negligible response value drift (8.8%) in the range of 10%–90% relative humidity. Furthermore, UV-assisted WS 2 /PbS gas sensor also possesses prominent sensing performances including high sensitivity, low detection limit (∼20 ppb), favorable selectivity and outstanding long-term stability. This research will pave the way on designing high-performance TMDs-based gas sensors operating at room temperature.
研究领域:
材料科学
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纳米科技
·
传感器技术
·
环境监测
·
半导体物理
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表面化学
·
光电子学
✓ 已验证
DOI
高影响因子
Nature Nanotechnology
·
2022
·Vol. 17
·期 11
·1178-1182
·
IF 40.523
Chen Yang,Qian Shuhang,Wang Kai,Xing Xiangyuan,Wee Andrew,Loh Kian Ping,Wang Bing,Wu Dong,Chu Jiaru,Alu Andrea,Lu Peixiang,Qiu Cheng-Wei
Valleytronics is a promising candidate to address low-energy signal transport on chip, leveraging the valley pseudospin of electrons as a new degree of freedom to encode, process and store information 1 , 2 , 3 , 4 , 5 , 6 , 7 . However, valley-carrier nanocircuitry is still elusive, because it essentially requires valley transport that overcomes three simultaneous challenges: high fidelity, high directionality and room-temperature operation. Here we experimentally demonstrate a nanophotonic circuit that can route valley indices of a WS 2 monolayer unidirectionally via the chirality of photons. Two propagating modes are supported in the gap area of the circuit and interfere with each other to generate beating patterns, which exhibit complementary profiles for circular dipoles of different handedness. Based on the spin-dependent beating patterns, we showcase valley fidelity of chiral photons up to 98%, and the circulation directionality is measured to be 0.44 ± 0.04 at room temperature. The proposed nanocircuit can not only enable the construction of large-scale valleytronic networks but also serve as an interactive interface to integrate valleytronics 3 , 4 , 5 , spintronics 8 , 9 , 10 and integrated photonics 11 , 12 , 13 , opening new possibilities for hybrid spin-valley-photon ecosystems at the nanoscale.
研究领域:
光子学
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纳米技术
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材料科学
·
量子信息科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuqing Li,Bohao Liu,Yong Zhang
FET-type sensors have attracted considerable attention in trace-level hazardous analytes detection based on signal amplification effect. However, most of these sensors with either sensing gate or sensing channel are susceptible to humidity and signal crosstalk, significantly weakening the sensing performance. Herein, enlightened by the regulation of channel carriers attracted by ions from electric double layer (EDL), a side-gate FET (S-FET) gas sensor with ionogel dielectric sensing layer is rationally designed for proving the feasibility of novel capacitance sensing mode. The side-gate structure adequately exposes the dielectric sensing layer to the target gas and protects the channel region from being directly contacted to the ambient environment, guaranteeing the electrical and sensing stability of the sensor. Meanwhile, the gas volumetric adsorption nature of ionogel directly regulates the migration of ion carriers, macroscopically manifests the changes of EDL capacitance and ultimately influences the channel current of FET. The proposed FET sensor achieves excellent room-temperature gas sensing performances toward 0.02 ∼ 10 ppm of H 2 S, demonstrating an exceptional capability in food spoilage monitoring/halitosis prediagnosis. This work proposes a novel working mode of FET-type gas sensor for extending the categories of FET sensors, and offers relevant design concept in capacitance modulation for amplifying trace-level analytes-induced signal.
研究领域:
传感器与传感技术
·
电子器件
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气体检测
·
纳米电子学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Dongli Li,Yinan Dong,Hua Zhang,Dagang Liu,Zhituo Geng,Chenxi Li,Hao Li,Jiayao Zhou,Zhipeng Li,Hai Lin,Weitian Zhang,Shengze Yu,Shuyan Yu,Congju Li,Yongping Huang,Jingkun Jiang,Zehui Li
Nitrogen oxides (NO x ) monitoring requires sensor platforms that deliver ppb-level sensitivity, ambient-temperature operation, and molecular discrimination. However, rapid and selective NO x detection at room temperature remains elusive. Although 2D transition metal carbides/nitrides (MXenes) show promise in chemiresistive sensing, their susceptibility to ambient degradation and poor selectivity limit practical deployment. Here, a room-temperature NO x sensor is developed by epitaxially growing Hofmann-type metal–organic frameworks (Ni-pyz) on oxygen-terminated monolayer large-size MXene (Ti 3 C 2 T x ). The Ni-pyz/Ti 3 C 2 T x heterostructure exhibits enhanced sensitivity (4.8 and 5.5 times compared to Ti 3 C 2 T x ) and low detection limits (8.8 and 6.9 ppb) for NO and NO 2 , along with high selectivity and good stability (>85% response after 8 weeks). The enhanced sensitivity results from electronic coupling between the Ti 3 C 2 T x and Ni(CN) 4 , promoting charge transfer with NO x . The improved selectivity arises from the pore confinement effect of Ni-pyz and the specific adsorption of NO x through Lewis acid-base interactions with open Ni sites. Importantly, the dynamic response of Ni-pyz/Ti 3 C 2 T x closely mirrors that of a trace-level chemiluminescence NO x analyzer at low NO x concentrations, enabling high-temporal-resolution, long-term atmospheric monitoring. This functional strategy overcomes the insufficiency of MXene-based gas sensors, paving the way for the development of high-performance sensors.
研究领域:
材料科学
·
纳米技术
·
化学传感
·
环境监测
·
金属有机框架（MOFs）
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）