检索结果-南通市图书馆

用于紫外线成像和无线报警的水凝胶基可伸缩、高稳定性和高性能的光电传感器

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第6期67卷 1926-1937页

作者：洪杰钊姚帝杰王浩丁琼玲罗艺冰于家豪张鹤曾令兴杨柏儒王冰陶凯吴进 State Key Laboratory of Optoelectronic Materials and Technologies and Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518063China State Key Laboratory of Transducer Technology Shanghai 200050China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing National Engineering Research Center of Novel Equipment for Polymer ProcessingKey Laboratory of Polymer Processing Engineering(SCUT)Ministry of EducationSouth China University of TechnologyGuangzhou 510641China Engineering Research Center of Polymer Green Recycling of Ministry of Education College of Environment and ResourcesFujian Normal UniversityFuzhou 350007China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

柔性可穿戴的紫外线探测器在个体紫外线暴露监测、智能仿生眼和军事领域受到广泛关注.然而,传统不可拉伸的材料和器件结构设计限制了设备在可动态变形的人体皮肤和非平面表面上的精确监测应用和稳定附着.在本研究中,我们提出了基于氧化... 详细信息

柔性可穿戴的紫外线探测器在个体紫外线暴露监测、智能仿生眼和军事领域受到广泛关注.然而,传统不可拉伸的材料和器件结构设计限制了设备在可动态变形的人体皮肤和非平面表面上的精确监测应用和稳定附着.在本研究中,我们提出了基于氧化铜/碳-水凝胶-氧化锌/碳的新型应变隔离异质结构的本征可拉伸(拉伸应变或弯曲高达150%)紫外线探测器,该探测器具有高灵敏度(开/关比为2100%)、高稳定性(大于4000次循环),以及快速响应和恢复时间(分别为1.5和4 s).值得注意的是,该探测器通过水凝胶桥在氧化铜/碳和氧化锌/碳电极之间引入的p-n结能带结构,以及离子导电水凝胶中I^(-)/I_(3)^(-)的电化学反应机制,显著提高了其载流子效率和紫外线响应强度.本文通过集成传感器与所设计的电路板,进一步开发了一种无线紫外线报警系统,用于紫外线强度超标警报.此外,本文还设计了一种光电传感器阵列,并将其用作视网膜假体,以实现对环境紫外线强度的实时监测和成像.本文基于水凝胶基异质结构为开发可穿戴、可拉伸的光电紫外线传感器单元和成像阵列提供了一种新的可行方法.

关键词： flexible hydrogel sensors stretchable UV sensors UV imaging array optoelectronic sensors wireless alarm

Self-Healing,Self-Adhesive and Stable Organohydrogel-Based Stretchable Oxygen Sensor with High Performance at Room Temperature

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第3期14卷 257-275页

作者： Yuning Liang Zixuan Wu Yaoming Wei qiongling ding Meital Zilberman Kai Tao Xi Xie Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Department of Biomedical Engineering Faculty of EngineeringTel Aviv University69978 Tel AvivIsrael Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

With the advent of the 5G era and the rise of the Internet of Things,various sensors have received unprecedented attention,especially wearable and stretchable sensors in the healthcare ***,a stretchable,self-healable,self-adhesive,and room-temperature oxygen sensor with excellent repeatability,a full concentration detection range(0-100%),low theoretical limit of detection(5.7 ppm),high sensitivity(0.2%/ppm),good linearity,excellent temperature,and humidity tolerances is fabricated by using polyacrylamide-chitosan(PAM-CS)double network(DN)organohydrogel as a novel transducing *** PAM-CS DN organohydrogel is transformed from the PAM-CS composite hydrogel using a facile soaking and solvent replacement *** with the pristine hydrogel,the DN organohydrogel displays greatly enhanced mechanical strength,moisture retention,freezing resistance,and sensitivity to ***,applying the tensile strain improves both the sensitivity and response speed of the organohydrogel-based oxygen ***,the response to the same concentration of oxygen before and after self-healing is basically the ***,we propose an electrochemical reaction mechanism to explain the positive current shift of the oxygen sensor and corroborate this sensing mechanism through rationally designed *** organohydrogel oxygen sensor is used to monitor human respiration in real-time,verifying the feasibility of its practical *** work provides ideas for fabricating more stretchable,self-healable,self-adhesive,and high-performance gas sensors using ion-conducting organohydrogels.

关键词： Stretchable oxygen sensors Organohydrogel Self-healing Self-adhesive Electrochemical reaction

Humidity Sensing of Stretchable and Transparent Hydrogel Films for Wireless Respiration Monitoring

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第11期14卷 218-236页

作者： Yuning Liang qiongling ding Hao Wang Zixuan Wu Jianye Li Zhenyi Li Kai Tao Xuchun Gui Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Respiratory monitoring plays a pivotal role in health assessment and provides an important application prospect for flexible humidity ***,traditional humidity sensors suffer from a trade-off between deformability,sensitivity,and transparency,and thus the development of high-performance,stretchable,and low-cost humidity sensors is urgently needed as wearable ***,ultrasensitive,highly deformable,and transparent humidity sensors are fabricated based on cost-effective polyacrylamide-based double network ***,a general method for preparing hydrogel films with controllable thickness is proposed to boost the sensitivity of hydrogel-based sensors due to the extensively increased specific surface area,which can be applied to different polymer networks and facilitate the development of flexible integrated *** addition,sustainable tapioca rich in hydrophilic polar groups is introduced for the first time as a second cross-linked network,exhibiting excellent water adsorption *** the synergistic optimization of structure and composition,the obtained hydrogel film exhibits an ultrahigh sensitivity of 13,462.1%/%RH,which is ***,the hydrogel film-based sensor exhibits excellent repeatability and the ability to work normally under stretching with even enhanced *** a proof of concept,we integrate the stretchable sensor with a specially designed wireless circuit and mask to fabricate a wireless respiratory interruption detection system with Bluetooth transmission,enabling real-time monitoring of human health *** work provides a general strategy to construct high-performance,stretchable,and miniaturized hydrogel-based sensors as next-generation wearable devices for real-time monitoring of various physiological signals.

关键词： Stretchable and transparent humidity sensors Hydrogel film Wireless and wearable sensor Respiration monitoring Ultrasensitive

Stretchable, self‐healable, and breathable biomimetic iontronics with superior humidity‐sensing performance for wireless respiration monitoring

在线全文

学校读者我要写书评

暂无评论

SmartMat 2023年第2期4卷 88-105页

作者： qiongling ding Hao Wang Zijing Zhou Zixuan Wu Kai Tao Xuchun Gui Chuan Liu Wenxiong Shi Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies the Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat‐sen UniversityGuangzhouChina Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi'anChina Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjinChina

Stretchable,self‐healing,and breathable skin‐biomimetic‐sensing iontronics play an important role in human physiological signal monitoring and human–computer ***,previous studies have focused on the mimicking of skin tactile sensing(pressure,strain,and temperature),and the development of more functionalities is *** this end,a superior humidity‐sensitive ionic skin is developed based on a self‐healing,stretchable,breathable,and biocompatible polyvinyl alcohol–cellulose nanofibers organohydrogel film,showing a pronounced thickness‐dependent humidity‐sensing *** as‐prepared 62.47‐μm‐thick organohydrogel film exhibits a high response(25,000%)to 98%RH,excellent repeatability,and long‐term stability(120 days).Moreover,this ionic skin has excellent resistance to large mechanical deformation and damage,and the worn‐out material can still retain its humidity‐sensing capabilities after self‐***‐sensing mechanism studies show that the induced response is mainly related to the increase of proton mobility and interfacial charge transport efficiency after water *** superior humidity responsiveness is attributed to the reduced thickness and the increased specific surface area of the organohydrogel film,allowing real‐time recording of physiological ***,by combining with a self‐designed printed circuit board,a continuous and wireless respiration monitoring system is developed,presenting its great potential in wearable and biomedical electronics.

关键词： biomimetic iontronics humidity sensor organohydrogel film self‐healable and breathable wireless respiration monitoring

Self-healable, recyclable, ultrastretchable, and high-performanceNO_(2) sensors based on an organohydrogel for room and sub-zero temperature and wireless operation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SmartMat 2023年第1期4卷 168-184页

作者： qiongling ding Zijing Zhou Hao Wang Zixuan Wu Kai Tao Bo-Ru Yang Xi Xie Jun Fu Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhouChina Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi'anChina School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhouChina

To date,development of high-performance,stretchable gas sensors operating at and below room temperature(RT)remains a challenge in terms of traditional sensing ***,we report on a high-performance NO_(2) gas sensor based on a self-healable,recyclable,ultrastretchable,and stable polyvinyl alcohol–cellulose nanofibril double-network organohydrogel,which features ultrahigh sensitivity(372%/ppm),low limit of detection(2.23 ppb),relatively fast response and recovery time(41/144 s for 250 ppb NO_(2)),good selectivity against interfering gases(NH3,CO_(2),ethanol,and acetone),excellent reversibility,repeatability,and long-term stability at RT or even at−20°*** particular,this sensor shows outstanding stability against large deformations and mechanical damages so that it works normally after rapid self-healing or remolding after undergoing mechanical damage without significant performance degradation,which has major advantages compared to state-of-the-art gas *** high NO_(2) sensitivity and selectivity are attributed to the selective redox reactions at the threephase interface of gas,gel,and electrode,which is even boosted by applying tensile *** a specific electrical circuit design,a wireless NO_(2) alarm system based on this sensor is created to enable continuous,real-time,and wireless NO_(2) detection to avoid the risk of exposure to NO_(2) higher than threshold concentrations.

关键词： hydrogel NO_(2)gas sensor self-healing and recyclable organohydrogel stretchable and wearable electronics wireless gas sensor

Engineering Smart Composite Hydrogels for Wearable Health Monitoring

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第7期15卷 233-277页

作者： Jianye Li qiongling ding Hao Wang Zixuan Wu Xuchun Gui Chunwei Li Ning Hu Kai Tao Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China Department of Chemistry Zhejiang UniversityHangzhou 310058People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215People’s Republic of China Department of Otolaryngology The First Affiliated HospitalSun Yat-Sen UniversityGuangzhou 510275People’s Republic of China

Growing health awareness triggers the public's concern about health problems. People want a timely and comprehensive picture of their condition without frequent trips to the hospital for costly and cumbersome general check-ups. The wearable technique provides a continuous measurement method for health monitoring by tracking a person's physiological data and analyzing it locally or *** the health monitoring process,different kinds of sensors convert physiological signals into electrical or optical signals that can be recorded and transmitted, consequently playing a crucial role in wearable techniques. Wearable application scenarios usually require sensors to possess excellent flexibility and stretchability. Thus, designing flexible and stretchable sensors with reliable performance is the key to wearable technology. Smart composite hydrogels, which have tunable electrical properties, mechanical properties, biocompatibility, and multi-stimulus sensitivity, are one of the best sensitive materials for wearable health monitoring. This review summarizes the common synthetic and performance optimization strategies of smart composite hydrogels and focuses on the current application of smart composite hydrogels in the field of wearable health monitoring.

关键词： Wearable health monitoring Smart composite hydrogel Hydrogel engineering Wearable sensor Flexible and stretchable sensors

Ultrasensitive,stretchable,and transparent humidity sensor based on ionconductive double-network hydrogel thin films

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2022年第9期65卷 2540-2552页

作者： Zixuan Wu qiongling ding Zhenyi Li Zijing Zhou Luqi Luo Kai Tao Xi Xie Jin Wu State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China The Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072China

Ion-conductive hydrogels with intrinsic biocompatibility,stretchability,and stimuli-responsive capability have attracted considerable attention because of their extensive application potential in wearable sensing *** miniaturization and integration of hydrogel-based devices are currently expected to achieve breakthroughs in device performance and promote their practical ***,currently,hydrogel film is rarely reported because it can be easily wrinkled,torn,and dehydrated,which severely hinders its development in ***,thin,stretchable,and transparent ion-conductive double-network hydrogel films with controllable thickness are integrated with stretchable elastomer substrates,which show good environmental stability and ultrahigh sensitivity to humidity(78,785.5%/% relative humidity(RH)).Benefiting from the ultrahigh surface-area-to-volume ratio,abundant active sites,and short diffusion distance,the hydrogel film humidity sensor exhibits2×10^(5)times increased response to 98% RH,as well as 5.9 and7.6 times accelerated response and recovery speeds compared with the bulk counterpart,indicating its remarkable thicknessdependent humidity-sensing *** humidity-sensing mechanism reveals that the adsorption of water improves the ion migration and dielectric constant,as well as establishes the electrical double ***,the noncontact human-machine interaction and real-time respiratory frequency detection are enabled by the *** work provides an innovative strategy to achieve further breakthroughs in device performance and promote the development of hydrogel-based miniaturized and integrated electronics.

关键词： stretchable hydrogel humidity sensor thin-film ultrasensitive wearable application

砂岩储层中凝灰质溶蚀效应的物理模拟实验研究——以珠江口盆地惠州—陆丰地区古近系文昌组为例

在线全文

学校读者我要写书评

暂无评论

石油实验地质 2024年第1期46卷 173-182页

作者：李晓艳彭光荣丁琳远光辉张琴吴琼玲靳子濠中海石油(中国)有限公司深圳分公司广东深圳518054 中海石油(中国)有限公司深海开发有限公司广东深圳518054 中国石油大学(华东) 山东青岛266071

为认识埋藏过程中酸性流体对碎屑岩储层中凝灰质的溶蚀改造效应及控制因素,选取珠江口盆地珠一坳陷惠州—陆丰地区古近系文昌组凝灰质砂岩储层,设计开展了岩心尺度的流体—岩石相互作用模拟实验。通过显微镜下观察、流体成分分析、物性... 详细信息

为认识埋藏过程中酸性流体对碎屑岩储层中凝灰质的溶蚀改造效应及控制因素,选取珠江口盆地珠一坳陷惠州—陆丰地区古近系文昌组凝灰质砂岩储层,设计开展了岩心尺度的流体—岩石相互作用模拟实验。通过显微镜下观察、流体成分分析、物性表征等方法,对比分析了实验前后不同流体流速、不同凝灰质含量条件下砂岩储层的溶蚀作用和物性响应特征。结果表明,酸性流体环境中凝灰质溶蚀现象普遍,但不同实验条件下,凝灰质溶蚀强度及储层物性响应不同:成岩体系的开放性与封闭性决定凝灰质的溶蚀作用强弱。相同岩石和相同酸性流体条件下,高流速开放体系中凝灰质溶蚀量高于封闭体系,且低流速相对封闭体系中溶蚀产物趋于沉淀,溶蚀作用增孔效应有限。凝灰质含量显著影响溶蚀效应,富凝灰质砂岩中溶蚀作用有限,含凝灰质砂岩和贫凝灰质砂岩能够溶蚀增孔,且含凝灰质砂岩的溶蚀增孔效率更高。凝灰质含量相对中等—较低的储层中,中浅层埋藏阶段的开放成岩流体体系最有利于粒间凝灰质溶孔的发育。经历晚期酸性流体溶蚀改造后,较易形成次生溶蚀型优质储层,这一认识有助于不同地区的溶蚀型储层甜点预测。

关键词：凝灰质溶蚀蚀变成岩体系溶蚀模拟实验惠州—陆丰地区珠一坳陷珠江口盆地

珠江口盆地陆丰凹陷文昌组凝灰质砂岩储层成岩相及发育模式

在线全文

学校读者我要写书评

暂无评论

世界地质 2024年第2期43卷 228-241页

作者：李晓艳丁琳李小平肖张波吴琼玲张月霞刘金良中海石油(中国)有限公司深圳分公司广东深圳518000

陆丰凹陷文昌组深层砂岩储层是珠江口盆地珠一坳陷最重要的油藏储集岩之一,而凝灰质发育导致储层致密,渗透率呈现低渗、特低渗特征。由于凝灰质影响,该区成岩作用及其展布表现出特殊性。运用偏光显微镜在对凝灰质砂岩储层的成岩作用、... 详细信息

陆丰凹陷文昌组深层砂岩储层是珠江口盆地珠一坳陷最重要的油藏储集岩之一,而凝灰质发育导致储层致密,渗透率呈现低渗、特低渗特征。由于凝灰质影响,该区成岩作用及其展布表现出特殊性。运用偏光显微镜在对凝灰质砂岩储层的成岩作用、自生矿物转化及孔隙类型详细观察的基础上,结合扫描电镜、孔渗测试及测井资料分析,对陆丰凹陷文昌组凝灰质砂岩储层成岩相及其发育模式进行了研究。结果表明,凝灰质蚀变作用是影响储层物性的主要成岩作用,其次是压实作用和溶蚀作用。依据各种成岩作用强度及其组合,储层整体可以分为5种成岩相:①中压实--弱胶结--凝灰质中等溶解相(Ⅰ类);②中强压实--弱胶结--凝灰质强溶解相(Ⅱ类);③中强压实--磷灰石中强胶结--中等溶解相(Ⅲ类);④中强压实--高岭石中强胶结--弱溶解相(Ⅳ类)和⑤强压实--弱胶结--弱溶解相(Ⅴ类)。其中Ⅰ类成岩相为优质成岩相(孔隙度均值为13.4%、渗透率均值为5.4×10^(-3)μm^(2)),Ⅱ类成岩相为有利成岩相(孔隙度均值为15.4%、渗透率均值为1.5×10^(-3)μm^(2)),Ⅲ类和Ⅳ类成岩相为潜在有利成岩相(孔隙度均值为15.0%、渗透率均值为1.0×10^(-3)μm^(2)),Ⅴ类成岩相为不利成岩相。受大气水淋滤和有机酸溶蚀等影响,陆丰凹陷文昌组深层砂岩储层主要发育Ⅱ-Ⅲ-Ⅳ-Ⅴ和Ⅰ-Ⅴ两种成岩相组合模式。成岩相与储层质量密切相关,通过识别优质成岩相可以预测有利储层分布,为油气勘探提供地质依据。

关键词：凝灰质砂岩低渗储层成岩演化成岩相文昌组陆丰凹陷珠江口盆地

维普期刊数据库博看期刊