Nano Energy
·
2023
·
IF 17.6
Qianqian Liang,Dong Zhang,Yuchen Wu,Xiangyang Qu,Yuhang Jia,Shiyan Chen,Huaping Wang,Chengkuo Lee
As a multifunctional monitoring platform based on the human environment, fiber-based capacitive sensors are promising wearable electronic devices. However, it is of great challenge to select suitable dielectric materials and construct a bimodal capacitive sensor with excellent stretchability, high compatibility and stable sensing capability. Here, we report a bacterial cellulose (BC)@BC/carbon nanotube (CNT) helical fiber with skin-core structure, and biodegradable BC as the skin and conductive BC/CNT as the core, which exhibits tensile strength of 148 MPa and break elongation of 536 %. Two helical fibers are cross-assembled into a bimodal sensor, dedicated to detecting pressure and proximity. In the contact mode, the capacitance of the sensor increases with the increase of the pressure (0–50 N) with good sensitivity of 2.92 N −1 . In the noncontact mode, the sensor exhibits a monitoring range of 0–20 cm, and the capacitance change rate is 31 % when the finger is close to 0.5 cm. Additionally, our bimodal sensor can be used to detect the body’s omnidirectional motion and even help referees to efficient judgment in sports. In a word, our capacitive sensor provides a tremendous advantage and foundation for the development of smart fibers and the research of intelligent textiles .
研究领域:
材料科学
·
生物医学工程
·
可穿戴设备
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Shuning Chen,Xu Wang,Bozhi Wu,Jiahong Kang,Ji Zhou,Meng Nie,Litao Sun
Wearable multi-functional sensors have attracted favorable attention due to their promising applications in artificial limbs, health monitoring, and human-machine interfaces. However, developing the intrinsic integrating sensors embowed multi-parameters independently decoupled is still a critical challenge. Here, a multi-level hierarchical architectural integrated dual-functional sensor with shared electrodes is proposed to decouple pressure and temperature signals independently. The capacitive pressure-sensitive layer is constructed by the designed unique dot-knot micro-structures to obtain the multi-level hierarchical architecture with the thermoplastic polyurethane@polyaniline (TPU@PANI) membrane. The designed micro-structures effectively realize the pressure sensing in stage to obtain an ultra-wide measurement range and an ultra-low pressure detection. Meanwhile, the hierarchical micro-structure buffers the pressure acting on the temperature-sensitive layer to solve the signal crosstalk. The resistive temperature-sensitive layer is formed with a serpentine-shaped nickel oxide (NiO) film based on the negative temperature coefficient (NTC) effect by microelectronic printing. The proposed sensor processes an ultra-wide pressure range of 23 MPa, high linearity values of 0.998 and 0.991 in ranges of 0–580 kPa and 10 -23 MPa, an ultra-low pressure detection limit of 3 Pa, and a high temperature sensitivity of -1.85%/°C over 25 to 60 °C. Demonstrations of the presented flexible integrated sensor to monitor vocalization, motion, breathing, and object grabbing/releasing in various application scenarios involving coupled pressure/temperature stimuli exhibited its excellent potential capabilities in wearable electronics.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 15
·5035-5047
·
IF 4.052
Ling Zhu,Yue-Ling Bai,Yongmei Zhao,Feifei Xing,Ming-Xing Li,Shourong Zhu
A complexone analog chemosensor, H2L, bearing chelating bis(2-pyridylmethyl) amine and alizarin groups was synthesized via the Mannich reaction. H2L chromically responds to OH−, F−, CH3COO−, and H2PO4− in DMF, CH3CN, and acetone, but not in CH3OH or H2O. The addition of F− ions to H2L selectively induces a significant and visible color change in acetonitrile and shifts both methylene proton signals upfield. H2L also exhibits visible responses to Mg2+, Sr2+, Ba2+, Tb3+, Cu2+, Co2+, Ni2+, Zn2+, Mn2+, Cd2+, and Fe3+ in solution. AlCl3 can form an Al : L = 2 : 3 complex that not only changes the color of the DMF solution, but also significantly increases its fluorescence intensity. The limit of fluorescence turn-on detection for AlCl3 in DMF is 2.7 × 10−8 M, which is an order higher than those of other anthraquinone sensors reported in the literature. NMR spectroscopy shows that hydroxyl is not deprotonated upon interacting with Al3+, but will be partially deprotonated in the presence of Zn2+. Contrary to the complexone, the H2L–Ce(III) complex does not react chromically to F−. However, the H2L–NiCl2 complex responds chromically to F−, with higher sensitivity (LOD = 1.3 × 10−6 M F− in acetonitrile) than free H2L. The spectral changes in the presence of F− are similar to that of OH−; however, the spectrum shifts slightly to a longer wavelength and is more sensitive to both H2L and the H2L–NiCl2 complex. Moreover, 4% or less H2O in the solvent essentially has no influence on the F− sensitivity; however, high water content significantly decreases the F− sensitivity. The spectral changes of the Zn2+, Cu2+, Fe3+, Ce3+, and Ni2+ complexes in the presence of different NaOH concentrations were also investigated.
研究领域:
化学传感器
·
分析化学
·
配位化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Materials Science
·
2025
·
IF 17.9
Shu Wang,Jiangling Ning,Jianyu Pu,Changjie Wei,Yuping Yuan,Songqi Yao,Yuantao Zhang,Ziwen Jing,Chenxing Xiang,Xinglong Gong,Zhi Li,Ning Hu
Ionogels have demonstrated substantial applications in smart wearable systems, soft robotics, and biomedical engineering due to the exceptional ionic conductivity and optical transparency. However, achieving ionogels with desirable mechanical properties, environmental stability, and multi-mode sensing remains challenging. Here, we propose a simple strategy for the fabrication of multifunctional silk fabric-based ionogels (BSFIGs). The resulting fabric ionogels exhibits superior mechanical properties, with high tensile strength (11.3 MPa) and work of fracture (2.53 MJ/m 3 ). And its work of fracture still has 1.42 MJ/m 3 as the notch increased to 50 %, indicating its crack growth insensitivity. These ionogels can be used as sensors for strain, temperature, and tactile multi-mode sensing, demonstrating a gauge factor of 1.19 and a temperature coefficient of resistance of −3.17/°C -1 . Furthermore, these ionogels can be used for the detection of different roughness and as touch screens. The ionogels also exhibit exceptional optical transmittance and environmental stability even at −80 °C. Our scalable fabrication process broadens the application potential of these multifunctional ionogels in diverse fields, from smart systems to extreme environments.
研究领域:
材料科学
·
智能可穿戴系统
·
柔性机器人
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhihua Zhao,Shuhan Chen,Qingsheng Shi,Chao Qiu,Lan Wu,Xinhao Zhang,Peijuan Wu,Longqi Yao
People pay more and more attention to their own health and environmental safety, which makes the monitoring and treatment of harmful amines such as triethylamine (TEA) emitted in the industrial process increasingly critical. In order to address this issue, we focus on the heterostructure construction of two-dimensional rhenium disulfide (ReS 2 ) and acid-functionalized carbon nanotubes (f-MWCNTs), using their unique electronic properties and high specific surface area for triethylamine gas detection. The findings demonstrated that, at room temperature (25°C), the ReS 2 /f-MWCNTs sensor's response to 100 ppm TEA reached 63 %. Under the same environmental conditions (25℃), the response value of the ReS 2 sensor to 100 ppm TEA is 6 %, and the sensing performance is improved by more than 10 times. In addition, the sensor has fast response recovery (73 s/46 s) and good repeatability and stability. Based on this research, we designed a simple detection device, providing a direction for the practical detection application of TEA sensors.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
环境监测
·
电子器件
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jianzhen Wu,Yijie Liu,Shengming Hua,Fanjun Meng,Qinglin Ma,Shuliang Song,Yuju Che
Building stimulus-responsive units in the hydrogel coatings remains challenging for film sensors consisting of alternated layers of inert substrates and hydrogel coatings. An interesting film sensor with a carboxymethyl starch-based hydrogel coating was developed here. The cross-linking networks of carboxymethyl starch play the roles of structure-constructing units and stimulus-controlling units simultaneously, endowing the coatings with thermal sensing and strain sensing capabilities. The dynamic cross-links formed via the boronic ester bonds are temperature-sensitive, releasing or consuming additional acid ions with temperature alteration, and also as primary networks give the hydrogel strength and stretchability with the assistance of semi-penetrated polyacrylamide chains. Therefore, as-prepared flexible film sensors can be used to detect the periodic changes of human temperature and small-scale motion with multiple working modes, discriminating the physical states related to human health. Moreover, this kind of starch-based coating is degradable in a strongly alkaline solution and the inert substrate layer can protect the skin from erosion caused by direct hydrogel-skin contact, and thereby the film sensor is human- and environmentally friendly. This work also proposes a strategy of building temperature-sensitive units in the film sensor via regulating the chemical networks, instead of tuning physical structures.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Crystals
·
2023
·Vol. 13
·期 5
·810
·
IF 2.7
Ruonan Tian,Huai Tan,Gang Chen,Hongtao Guan,Chengjun Dong,Zongyou Yin
Although individual γ-Fe2O3and α-Fe2O3have been widely fabricated for gas sensors, their mixed phase of α/γ-Fe2O3might deliver excellent sensing properties. In this study, a facile solvothermal method was used to fabricate Fe-alkoxide. After thermal treatment, it was converted into γ-Fe2O3, α-Fe2O3and their mixed-phase α/γ-Fe2O3with a nanosheets-assembled flower-like structure. We studied the influence of calcination temperature on the phase and sensing properties on acetone detection. The α/γ-Fe2O3which annealed at 400 °C included 18% α-Fe2O3and it exhibited excellent sensing performance towards acetone compared to that of γ-Fe2O3and α-Fe2O3. It showed a response of 353 to acetone with a concentration of 200 ppm, and a low limit of detection of 0.5 ppm at 160 °C. In addition, the change in responses with acetone concentration from 50 to 200 ppm shows a good linear relationship. Moreover, this material has good reproducibility and selectivity as well as a fast response time of 22 s and recovery time of 14 s to 200 ppm. Therefore, our mixed phase of α/γ-Fe2O3possesses great prospects for acetone detection.Keywords:Fe2O3;phase;gas sensor;acetone;sensing performance
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
YuXiang Qin,ZiCheng Zhou
The multinetwork hydrogel-based biomechanical sensor has attracted considerable attention due to its excellent mechanical properties. However, in most cases, due to the weak binding force of the hydrogel matrix to water and the uneven structure of the sensing layer, it is difficult to prepare pressure (strain) sensors that can quantify stimuli-response and be durable for long periods. Moreover, the preparation of hydrogels often involves the intervention and residue of toxic substances, making them unsuitable for monitoring biomechanical indicators. In this paper, we prepared a flexible, conductive biohydrogel capable of long-term storage using low-cost, biocompatible materials. The hydrogel is composed of lignosulfonate sodium and poly(vinyl alcohol), blended with acrylic acid and enhanced with various cations with different hydration abilities. The pressure sensor based on the as-prepared hydrogel exhibits a high sensitivity of 1.145 kPa–1 to medium pressure encountered by the human body (i.e., 0.1 to 10 kPa). Due to the high flexibility and toughness of the hydrogel, the corresponding pressure sensor demonstrates 2500 cycles of cycling stability. Also, the strain sensor based on the as-prepared hydrogel shows a wide testing range from 0 to 1100% and quantifies the strain–response physical process based on its mechanical and electrical properties, making it suitable for use. Due to the compressibility, high sensitivity, and long-term stability, the proposed sensors could show great potential in wearable electronic devices for monitoring biological activities.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jing Hu,Qin Ren,Dongqing Fan,Wenbo Wu,Xiaoying Zhang,Dongxin Wang,Junxiu Zhao,Ping Zhang,Xiangjun Li,Liangpo Liu,Jisheng Nie,Hong Cui
Metal–organic gel (MOG) is a distinctive metal–organic hybrid material with a unique porous structure and exceptional catalytic site accessibility. The rational design of an electrochemical and colorimetric dual-mode sensor platform utilizing the peroxidase (POD)-like activity of MOG for the detection of H2O2 is crucial for clinical diagnosis. In this article, a two-dimensional composite nanozyme based on Fe-MOG and carboxylated graphene oxide (GO-COOH) was synthesized, which serves dual functions to establish electrochemical sensing and colorimetric sensing based on its excellent electrocatalytic reduction of H2O2 and POD-like activity. GO-COOH played a critical role, and the electrochemically reduced ERGO-COOH facilitated electron transfer from the metal catalytic site in Fe-MOG, enhancing the performance of electrocatalytic reduction of H2O2. Additionally, GO-COOH amplified the POD-like activity of Fe-MOG, and the Fe-MOG/GO-COOH composite participated in various ROS-mediated catalytic reactions. The developed dual-mode sensor exhibited a rapid response and high sensitivity in detecting H2O2, demonstrating excellent selectivity, reproducibility, and stability. These attributes enhanced the accuracy and reliability of the detection of H2O2 released from living cells. This MOG-based nanozymatic dual-mode sensing technology offers promising prospects for enhancing the reliability of rapid detection and holds significant potential for application in pathophysiological monitoring of living cells.
研究领域:
生物医学工程
·
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2017
·Vol. 29
·期 10
·2307-2315
·
IF 2.851
Jian Li,Zhanming Bai,Yanjun Mao,Qingqing Sun,Xiaohui Ning,Jianbin Zheng
A disposable sandwich-type electrochemical sensor for selective detection of glucose was established. The primary receptor, 3-aminophenylboronic acid was grafted covalently onto the surface of screen-printed carbon electrodes through an in situ-generated diazo-reaction. Glucose was first captured by boronic acid group on the electrode, followed by captureing an electroactive ferroceneboronic acid (FcBA) as the secondary receptor to form bidentate glucose-boronic complex. Electrochemical impedance spectroscopy was applied to characterize the construction of sandwich-type disposable sensor. In the sandwich assay, current response of captured FcBA on the electrode was dependent on the concentration of glucose. The sandwich assay showed higher selectivity for glucose than that for fructose, mannose, galactose and other electroactive interferences including uric acid, ascorbic acid and dopamine, and exhibited a dynamic concentration range of glucose from 0.5 to 20.0 mmol L −1 . The disposable sensor demonstrated a good reproducibility with 2.2 % relative standard deviation (RSD). In addition, the disposable glucose sensor was used in detection of the trace glucose in the clinical urine samples.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
Small
·
2023
·
IF 13.3
Xinlei Li,Shupeng Sun,Nan Wang,Baoyu Huang,Xiaogan Li
Non-invasive breath testing has gained increasing importance for early disease screening, spurring research into cheap sensors for detecting trace biomarkers such as ammonia. However, real-life deployment of ammonia sensors remains hindered by susceptibility to humidity-induced interference. The SnTe/SnSe heterojunction-based chemiresistive-type sensor demonstrates an excellent response/recovery to different concentrations of ammonia from 0.1 to 100 ppm at room temperature. The improved sensing properties of the heterojunctions-based sensors compared to single-phased SnTe or SnSe can be attributed to the stronger NH 3 adsorptions, more Te vacancies, and hydrophobic surface induced by the formed SnTe/SnSe heterojunctions. The sensing mechanisms are investigated in detail by using in situ techniques such as diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS), Kelvin probe, and a.c. impedance spectroscopy together with the Density-Function-Theory calculations. The formed heterojunctions boost the overall charge transfer efficiency between the ammonia and the sensing materials, thus leading to the desirable sensing features as well, with excellent resistance to ambient humidities.
研究领域:
材料科学
·
传感器技术
·
医学检测
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Lin Wang,Xue Gong,Qijing Bing,Guang Wang
An asymmetrical oxadiazole derivative (Sensor 1 ) containing one pyridine and one formyl connecting to two benzene rings on both sides of oxadiazole unit was designed and synthesized. Sensor 1 displayed selective colorimetric sensing for Co 2+ and Cu 2+ ions via color changes to blue and yellow from colorless in CH 3 CN solutions, respectively. Sensor 1 not only exhibited an instantaneous naked-eye color change and but also could be used as a convenient test kit for recognition and detection of Co 2+ ions. Sensor 1 presented high colorimetric sensitivity for Co 2+ with low detection limit (3.92 × 10 −6 mol/L). Sensor 1 also displayed “On-Off” fluorescent sensing for Cu 2+ over a wide range of competitive metal ions and could accurately detect the existence of Cu 2+ in water samples via the fluorescent quenching and color change. The fluorescence intensity of sensor 1 in CH 3 CN solution showed a linear response to Cu 2+ in the wide concentration range of 0–40 μM which is beneficial for quantitative analysis. The studies on absorbance and fluorescence titration, 1 H NMR spectrum and ESI-MS spectra confirmed that colorimetric sensing for Co 2+ and fluorescent sensing for Cu 2+ are ascribed to the complex formation with the stoichiometry of 1:1 for Co 2+ and 1:2 for Cu 2+ .
研究领域:
分析化学
·
材料科学
✓ 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）