ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jifeng Pan,Yunsong Li,Tian Tian,Zilong Tang,Zichao Lian,Nan Ma
The development of advanced humidity sensors is becoming increasingly essential for the progression of various industries, particularly for integration with IoT devices. Consequently, the creation of high-performance humidity sensors is of paramount importance. In this study, we present a highly sensitive humidity sensor based on the ferroelectric oxide BiFeO3, which is further enhanced by the incorporation of the hydrophilic inorganic salt NaCl. By optimizing the NaCl content and the thickness of the sensing film, the 15 wt % NaCl-BiFeO3 sensor with a film thickness of 68 μm demonstrated an exceptional response of 10,073 as the relative humidity was varied from 13 to 86% RH at room temperature, representing a 46.3-fold enhancement compared to pure BiFeO3-based sensors. The sensor also exhibited rapid response and recovery times of 0.27 and 5.73 s, respectively. The excellent humidity sensing performance can be attributed to the increased electrical conductivity, which results from the generation of free ions due to NaCl dissolution in adsorbed water under high humidity conditions. Furthermore, this highly sensitive sensor is well-suited for noncontact applications, such as human respiratory monitoring and contactless control. This work underscores the potential of NaCl-BiFeO3 as a highly promising material system for high-performance humidity sensors in smart sensing applications.
研究领域:
材料科学
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物联网技术
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传感器技术
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DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 29
·2314004
·
IF 27.4
Jing Jiang,Chenglong Li,Chenhong Chen,Chuanqian Shi,Jizhou Song
Transfer printing techniques based on tunable and reversible adhesives enable the heterogeneous integration of materials in desired layouts and are essential for developing both existing and envisioned electronic systems. Here, a novel tunable and reversible adhesive of liquid metal ferrofluid pillars for developing an efficient magnetically actuated noncontact transfer printing is reported. The liquid metal ferrofluid pillars offer the appealing advantages of gentle contact force by minimizing the preload effect and exceptional shape adaptability by maximizing the interfacial contact area due to their inherent fluidity, thus enabling a reliable damage-free pickup. Moreover, the liquid metal ferrofluid pillars harness the rapid stiffness increase and shape change with the magnetic field, generating an instantaneous ejection force to achieve a receiver-independent noncontact printing. Demonstrations of the adhesive of liquid metal ferrofluid pillars in transfer printing of diverse objects with different shapes, materials and dimensions onto various substrates illustrate its great potential in deterministic assembly.
研究领域:
材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-9
·
IF 7.3
Li Fuwang,Wei Jian,Qin Xiaomei,Chen Xue,Chen Dawei,Zhang Wentao,Han Jiaguang,Yuan Libo,Deng Hongchang
Field-controlled micromanipulation represents a pivotal technique for handling microparticles, yet conventional methods often risk physical damage to targets. Here, we discovered a completely new mechanism for true noncontact manipulation through photothermal effects, called thermal-optical tweezers. We employ a laser self-assembly photothermal waveguide (PTW) for dynamic microparticle manipulation. This waveguide demonstrates superior photothermal conversion and precision control, generating a nonisothermal temperature field. The interaction of thermal convection and thermophoresis within this field creates a microfluidic potential well, enabling noncontact and nondestructive particle manipulation. By varying the path of PTWs in lithography and manipulating laser loading modes, diverse manipulation strategies, such as Z-shaped migration, periodic oscillation, and directional transport, are achievable. Our innovative noninvasive micromanipulation technology minimizes not only physical damage to target objects but also enables precise and diverse manipulation of micro entities, opening up new avenues for the photothermal control of cells and biomolecules.
研究领域:
生物物理学
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光学工程
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细胞生物学
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DOI
PubMed
高影响因子
JOM
·
2022
·Vol. 74
·期 7
·2742-2749
·
IF 2.597
Zhang Rui-Hua,Hao Zhen-Hua,Shi Lin-Yuan,Chen Hao-Tian,Shu Yong-Chun,He Ji-Lin
In this present study, carbothermic reduction process of MoO 3 to produce MoO 2 has been carried to investigate the influences of reaction temperature and distance between activated carbon and MoO 3 on phase composition of reduction products by controlling carbon diffusion. Results show that the reduction degree increases with the increase of temperature and the decrease of distance between activated carbon and MoO 3 . MoO 3 can be completely reduced to MoO 2 at 680°C with the carbon distance of 1 mm. It is found that the transformation from MoO 3 to MoO 2 is a process of crystal cracking and growth by observing the phase transition and morphological evolution during the reduction. The massive MoO 3 is first decomposed into a platelet-shaped MoO x (2.75 < x < 3), then the platelet-shaped MoO x changes into a needle-like shape or irregular platelet-like Mo 4 O 11 , and finally Mo 4 O 11 changes into irregular granular or irregular platelet-like shaped crystals, which form MoO 2 powders.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jiaqi Lou,Yimeng Yang,Chengji Zhao
Polyhedral oligomeric silsesquioxane (POSS) is renowned for its facile modification and excellent stability, rendering it a promising candidate for humidity-sensitive materials. Achieving humidity sensors based on POSS with broad response ranges and fast response times remains a considerable hurdle. In this investigation, four organic-inorganic hybrid porous polymers, denoted as HCP-X, were synthesized through Friedel-Crafts reaction utilizing octaphenylcyclotetrasiloxane (OPCTS). The incorporation of hydrophilic functional groups onto HCP-X polymers increases their specific surface area and enhances their adsorption capacity for water molecules, thereby accelerating the humidity sensor's response to humidity. The resulting humidity sensors derived from HCP-X demonstrated rapid response times ranging from 0.6 s to 7 s. Notably, the HCP-B-SO 3 humidity sensor exhibited outstanding performance due to the synergistic effects of -OH and -SO 3 - groups, with a 6 orders of magnitude impedance change across the entire measured humidity range (11 % - 97 % RH), a rapid response time of 0.2 s, and excellent repeatability. It also showcased consistent long-term stability over a 30-day duration, maintaining its performance integrity at both 11 % and 97 % RH levels. The resulting humidity sensor was further utilized into non-contact switches and integrated into masks for health monitoring applications, underscoring its substantial potential in non-contact sensing and healthcare domains.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Yuhui Chen,Zhenhua Hao,Rulong Ma,Pei Wang,Yongchun Shu,Jilin He
Ultrafine tungsten (W) powder was prepared by a non-contact carbon reduction followed by hydrogen reduction method. In this process, WO 3 and activated carbon were separated by a porous plate and the reduction of tungsten oxide was achieved by carbon atoms diffusion at high temperature. This method can stably prepare violet tungsten oxide powder with low carbon content (194 ppm) using activated carbon as a reducing agent. It avoids the problem that the high residual carbon in reduction products in traditional carbon reduction experiment. Then, ultrafine tungsten powder with an average particle size of less than 100 nm was prepared by hydrogen reduction of violet tungsten oxide.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 2
·1193-1204
·
IF 6.123
Ma Hongliang,Liu Zhuqing,Lou Jiang,Ding Qijun,Jiang Yifei,Li Xia,Han Wenjia
As a human-computer interaction technology for the Internet of Things (IoT), non-contact humidity sensors have been widely explored. However, traditional humidity sensors have become a bottleneck in the development of flexible electronics owing to their complex processes and non-degradability. Here, bacterial cellulose (BC) and MWCNT were sequentially coated on paper to construct a durable and highly sensitive bacterial cellulose/MWCNT humidity sensor (BCNT). The BC endows the paper substrate with dense structure and significantly reduces the consumption of active materials (6.7 times reduction). Further, the well-dispersed CNT coating forms an interlocking structure with the BC nano-network, which results in a high mechanical strength (66.3 MPa). The maximum response of BCNT02 can be up to 94.5% (− ΔI/I 0 ) under 98% RH, and the response and recovery times were 150 and 297 s, respectively. Moreover, the high humidity sensitivity of the BCNT make it an excellent choice for research and development of humidity sensors for respiration detection, non-contact switching and humidity localization.
研究领域:
材料科学
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电子学
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传感器
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物联网(IoT)
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 48
·2408338
·
IF 18.5
Wenlong Wu,Tianyi Jiang,Min Wang,Tong Li,Yuxin Song,Jun Liu,Zuankai Wang,Hongyuan Jiang
Most flexible human–machine interfaces emulate the tactile system of the skin, which has the risk of contact damage. Additionally, contact deformation often leads to a hysteresis response. Non-contact interaction can address these problems. Inspired by the electroreception capabilities of the elephantnose fish, this study introduces a non-contact sensing model employing monopolar controlled ionic hydrogel. Compared to most existing mutual capacitive non-contact sensing models, this model not only boosts responsivity by over 3.5 times but also streamlines the sensing architecture. Utilizing this sensing model, a flexible non-contact human–machine interface is developed by organizing three differently shaped hydrogels into an asymmetric configuration. This device reliably discerns six non-contact gestures using machine learning algorithms and supports at least eleven interactive functions by detecting the duration of gestures, enabling continuous real-time control over external devices. This advancement heralds a more liberated paradigm of human–machine interaction with promising implications for the Internet of Things.
研究领域:
材料科学
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生物工程
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电子工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 5
·1-11
·
IF 23.2
Wen Xiaohong,Zhao Zengcai,Chen Yuchang,Shan Xinzhi,Zhao Xuefeng,Gao Xiumin,Zhuang Songlin
Multifunctional integrated flexible electronic skin (e-skin) is the essential medium for information exchange between humans and machines. Especially, the proximity/pressure/strain sensing has become a technological goal for various emerging wearable electronic devices, such as biomonitoring devices, smart electronics, augmented reality, and prosthetics. Herein, a stretchable hybrid electronic network-based e-skin is presented, fabricated by embedding 3D hollow MXene spheres/Ag NWs hybrid nanocomposite into PDMS, which can effectively avoid the electrode falling off due to stress concentration. This e-skin works in noncontact mode (proximity-negative capacitance) and contact mode (pressure-positive capacitance and strain-resistance) for multiplex detection of random external force stimuli without mutual interference. The macroscopic physical structure of stretchable electrodes and the microscopic hybrid three-dimensional conductive network jointly contribute to the good sensing performance of the device. This work provides an effective and universal strategy for the application of wearable intelligent electronic products that demand noncontact interaction and multimodal tactile perception.
研究领域:
材料科学
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生物医学工程
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电子工程
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DOI
高影响因子
Small
·
2019
·Vol. 15
·期 38
·1902801
·
IF 10.856
Juehan Yang,Ruilong Shi,Zheng Lou,Ruiqing Chai,Kai Jiang,Guozhen Shen
The development of noncontact humidity sensors with high sensitivity, rapid response, and a facile fabrication process is urgently desired for advanced noncontact human–machine interaction (HMI) applications. Here, a flexible and transparent humidity sensor based on MoO 3 nanosheets is developed with a low-cost and easily manufactured process. The designed humidity sensor exhibits ultrahigh sensitivity, fast response, great stability, and high selectivity, exceeding the state-of-the-art humidity sensors. Furthermore, a wearable moisture analysis system is assembled for real-time monitoring of ambient humidity and human breathing states. Benefiting from the sensitive and rapid response to fingertip humidity, the sensors are successfully applied to both a smart noncontact multistage switch and a novel flexible transparent noncontact screen for smart mobile devices, demonstrating the potential of the MoO 3 nanosheets-based humidity sensors in future HMI systems.
研究领域:
材料科学
·
电子工程
·
人机交互
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产品关联
DOI
PubMed
高影响因子
Algal Research-Biomass Biofuels and Bioproducts
·
2025
·
IF 4.5
Juan Liu,Shiqing Sun,Kangyu Chen,Shumei Gao,Dixing Chen,Yuejin Zhang,Changwei Hu
Fungi-microalgae consortia have great potential in microalgae harvesting and wastewater treatment. However, the symbiotic mechanisms underlying diffusible signaling metabolite production by fungi and microalgae remain unclear. Here, the positive impacts of Clonostachys rosea on Chlorella sp. were investigated using metabolomics and transcriptomics during a 5-day non-contact co-culture experiment. Co-cultured Chlorella sp. had a significantly higher growth rate and better photosynthetic performance than its mono-culture equivalent. The metabolites played important roles in the up-regulation of energy and amino acid metabolism processes in algal cells, whilst transcriptomics showed the up-regulation of genes involved in photosynthesis and signaling molecules. The biosynthesis of tryptophan and indole-3-acetic acid (IAA) was up-regulated in both algal cells and fungi, indicating that IAA is an important diffusible signaling molecule for algal growth regulation. This work provides novel insights into the signaling molecule interactions between fungi and microalgae in fungi-microalgae consortia.
研究领域:
微生物学
·
环境科学
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产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Guoqing Wang,Jingle Duan,Guifen Sun,Peng Wang,Chuizhou Meng,Derong Duan,Longxiao Zhang,Hao Kan,Yang Li
Electronic skin has fast developed in recent years for its promising application in wearable sensing. Multifunction of breathability, self-adhesion, sweat release and diverse sensing is highly required but has not been achieved on a single device. Herein, inspired by natural human skin, we develop a breathable and self-adhesive electronic skin based on an all-nanofiber platform with unique directional moisture-wicking properties and bifunctional pressure and non-contact sensing capability. The multifunctional device is integrated with four functional parts self-adhesive gel, moisture-wicking structure, pressure sensing layer and non-contact detection layer. Benefits from structural design and advanced sensing principles, the sensor not only demonstrates high pressure-sensing sensitivity of 23 kPa -1 and ultrawide non-contact detection range of 2 m but also exhibits excellent breathability of 53.9 mm s -1 and fast moisture-wicking ability. Interestingly, the sensor can be tightly attached to human skin at skin temperature and be easily peeled off at elevated temperatures by using the temperature-controlled reversible phase-transition gel. Towards practical wearable sensing applications, different movements can be identified with 97.3 % accuracy by using the four-layer Multi-Layer Perceptron neural network . This work will boost the development of next-generation multifunctional electronic skins with both wearing comfortability and diverse sensing capability.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）