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Self-assembled supramolecular immunomagnetic nanoparticles throughπ-πstacking strategy for the enrichment of circulating tumor cells

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Regenerative Biomaterials 2023年第1期10卷 603-613页

作者： yanchao mao Yujia Zhang Yue Yu Nanhang Zhu Xiaoxi Zhou Guohao Li Qiangying Yi Yao Wu National Engineering Research Center for Biomaterials Sichuan UniversityChengduSichuan 610064P.R.China

Owing to their high-specific binding toward targets as well as fast and convenient separation operations,immunomagnetic beads(IMBs)are widely used in the capture and detection of circulating tumor cells(CTCs).To construct the IMBs,surface modifications are generally performed to functionalize the magnetic cores(***_(3)O_(4)nanoparticles),and the employed surface modification strategies normally influence the structure and functions of the prepared IMBs in *** from the existing work,we proposed the use of supramolecular layer-by-layer(LBL)self-assembly strategy to construct the *** general,owing to theπ-πstacking interactions,the polydopamine,graphene oxide and‘molecular glue’γ-oxo-1-pyrenebutyric acid were self-assembled on Fe_(3)O_(4)nanoparticles sequentially,thereby accomplishing the integration of different functional components onto magnetic cores to prepare the self-assembled supramolecular immunomagnetic beads(ASIMBs).The ASIMBs showed high sensitivity,specificity and good biocompatibility to the model CTCs and low nonspecific adsorption to the negative cells(∼93%for MCF-7 cells and 17%for Jurkat cells).Meanwhile,ASIMBs possessed a remarkable potential to screen the rare MCF-7 cells out of large amounts of interfering Jurkat cells with the capture efficiency of 75-100%or out of mouse whole blood with the capture efficiency of 20-90%.The captured cells can be further recultured directly without any more treatment,which showed huge applicability of the ASIMBs for in vitro detection in clinical practices.

关键词： circulating tumor cells magnetic nanoparticles layer-by-layer self-assembly strategy π-π stacking

Non-contact cylindrical rotating triboelectric nanogenerator for harvesting kinetic energy from hydraulics

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Nano Research 2020年第7期13卷 1903-1907页

作者： Nan Zhang Cheng Qin Tianxing Feng Jun Li Zhirui Yang Xiupeng Sun Erjun Liang yanchao mao Xudong Wang MOE Key Laboratory of Materials Physics School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWI53706USA

Hydraulics provide a unique and widely existed mechanical energy source around us,such as in water or oil pipes,and ***,a non-contact cylindrical rotating triboelectric nanogenerator(TENG)was developed to harvest the mechanical energy from water *** of the TENG was based on the non-contact free-rotating between a curved Cu foil and a flexible nanostructured fluorinated ethylene propylene(FEP)polymer *** free-standing distance between two rotating interfaces avoided abrading of electrode *** TENG was able to effectively convert mechanical energy of the water flow into *** driven by water flow,the output voltage and current of the TENG reached 1,670 V and 13.4 uA,*** any energy storage component,the produced electricity could instantaneously power 12 white light emitting diodes(LEDs)bulbs and a digital *** non-contact rotating TENG would provide new opportunities for harvesting energy from many types of hydraulics as a self-sustainable power source for sensing,detection,and protection.

关键词： mechanical energy hydraulics triboelectric nanogenerator nanowire thin films non-contact

3D printed triboelectric nanogenerator as self-powered human–machine interactive sensor for breathing-based language expression

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Nano Research 2022年第8期15卷 7460-7467页

作者： Pengcheng Zhu Baosen Zhang Hongyi Wang Yiheng Wu Hengjun Cao Liubing He Chaoyue Li Xuepeng Luo Xing Li yanchao mao Key Laboratory of Materials Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China

Human–machine interfaces(HMIs)are important windows for a human to communicate with the outside *** current HMI devices such as cellphones,tablets,and computers can be used to help people with aphasia for language ***,these conventional HMI devices are not friendly to some particular groups who also lose their abilities of physical movements like in the intensive care unit(ICU)or vegetative patients to realize language ***,we report a breath-driven triboelectric nanogenerator(TENG)acting as a HMI sensor for language expression through human breathing without voice controls or manual *** TENG is integrated within a mask and fabricated via a three-dimensional(3D)printing *** wearing the mask,the TENG can produce responsive electric signals corresponding to the airflow from breathing,which is capable of recognizing human breathing types with different intensities,lengths,and *** the basis of the breathing recognition ability,a breathing-based language expressing system is further developed through introducing the Morse code as a communication *** with conventional language expressing devices,this system can extract subjective information of a person from breathing behaviors and output corresponding language text,which is not relying on voices or physical *** research for the first time introduces the self-powered breathing-based language expressing method to the field of HMI technology by using a 3D printed TENG,and could make HMI interactions become more friendly and fascinating.

关键词： self-powered sensor triboelectric nanogenerator human-machine interface breathing-based language expression

Nanoparticle-Decorated Ultrathin La2O3 Nanosheets as an Effcient Electrocatalysis for Oxygen Evolution Reactions

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Nano-Micro Letters 2020年第4期12卷 41-52页

作者： Guangyuan Yan Yizhan Wang Ziyi Zhang Yutao Dong Jingyu Wang Corey Carlos Pu Zhang Zhiqiang Cao yanchao mao Xudong Wang Department of Material Sciences and Engineering University of Wisconsin-MadisonMadisonWI 53706USA Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024People’s Republic of China MOE Key Laboratory of Materials Physics School of PhysicsZhengzhou UniversityZhengzhou 450001People’s Republic of China

Electrochemical catalysts for oxygen evolution reaction are a critical component for many renewable energy applications. To improve their catalytic kinetics and mass activity are essential for sustainable industrial applications. Here, we report a rare-earth metal-based oxide electrocatalyst comprised of ultrathin amorphous La2O3 nanosheets hybridized with uniform La2O3 nanoparticles(La2O3@NP-NS). Significantly improved OER performance is observed from the nanosheets with a nanometer-scale thickness. The as-synthesized 2.27-nm La2O3@NP-NS exhibits excellent catalytic kinetics with an overpotential of 310 mV at 10 m A cm^-2, a small Tafel slope of 43.1 mV dec^-1, and electrochemical impedance of 38 Ω. More importantly, due to the ultrasmall thickness, its mass activity, and turnover frequency reach as high as 6666.7 A g^-1 and 5.79 s^-1, respectively, at an overpotential of 310 mV. Such a high mass activity is more than three orders of magnitude higher than benchmark OER electrocatalysts, such as IrO2 and RuO2. This work presents a sustainable approach toward the development of highly e cient electrocatalysts with largely reduced mass loading of precious elements.

关键词： Oxygen evolution reaction Multiphase hybrid Two-dimensional nanomaterials Rare-earth oxides Ionic layer epitaxy

Intrinsically stretchable polymer semiconductor based electronic skin for multiple perceptions of force,temperature,and visible light

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Nano Research 2023年第1期16卷 1196-1204页

作者： Dongjuan Liu Pengcheng Zhu Fukang Zhang Peishuo Li Wenhao Huang Chang Li Ningning Han Shuairong Mu Hao Zhou yanchao mao Key Laboratory of Materials Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China

As a stretchable seamless device,electronic skin(E-skin)has drawn enormous interest due to its skin-like sensing *** the basic perception of force and temperature,multiple perception that is beyond existing functions of human skin is becoming an important direction for E-skin ***,the present E-skins for multiple perceptions mainly rely on different sensing materials and heterogeneous integration,resulting in a complex device ***,their stretchability is usually achieved by the complicated microstructure design of rigid ***,we report an intrinsically stretchable polymer semiconductor based E-skin with a simple structure for multiple perceptions of force,temperature,and visible *** E-skin is on the basis of poly(3-hexylthiophene)(P3HT)nanofibers percolated polydimethylsiloxane(PDMS)composite polymer semiconductor,which is fabricated by a facile solution *** E-skin shows reliable sensing capabilities when it is used to perceive strain,pressure,temperature,and visible *** on the E-skin,an intelligent robotic hand sensing and controlling system is further *** with conventional E-skins for multiple perceptions,this E-skin only has a simple monolayer sensing membrane without the need of combining different sensing materials,heterogeneous integration,and complicated microstructure *** a strategy of utilizing intrinsically stretchable polymer semiconductor to create simple structured E-skin for multiple perceptions will promote the development of E-skins in a broad application scenario,such as artificial robotic skins,virtual reality,intelligent gloves,and biointegrated electronics.

关键词： electronic skin stretchable polymer semiconductor multiple perception visible light artificial robotic skin

Soft multifunctional neurological electronic skin through intrinsically stretchable synaptic transistor

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Nano Research 2024年第7期17卷 6550-6559页

作者： Pengcheng Zhu Shuairong Mu Wenhao Huang Zeye Sun Yuyang Lin Ke Chen Zhifeng Pan Mohsen Golbon Haghighi Roya Sedghi Junlei Wang yanchao mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China School of Mechanical and Power Engineering Zhengzhou UniversityZhengzhou 450001China Department of Chemistry Shahid Beheshti UniversityTehran ***Iran

Neurological electronic skin(E-skin)can process and transmit information in a distributed manner that achieves effective stimuli perception,holding great promise in neuroprosthetics and soft *** E-skin with multifunctional perception abilities can enable robots to precisely interact with the complex surrounding ***,current neurological E-skins that possess tactile,thermal,and visual perception abilities are usually prepared with rigid materials,bringing difficulties in realizing biologically synapse-like ***,we report a soft multifunctional neurological E-skin(SMNE)comprised of a poly(3-hexylthiophene)(P3HT)nanofiber polymer semiconductor-based stretchable synaptic transistor and multiple soft artificial sensory receptors,which is capable of effectively perceiving force,thermal,and light *** stretchable synaptic transistor can convert electrical signals into transient channel currents analogous to the biological excitatory postsynaptic *** it also possesses both short-term and long-term synaptic plasticity that mimics the human memory *** integrating a stretchable triboelectric nanogenerator,a soft thermoelectric device,and an elastic photodetector as artificial receptors,we further developed an SMNE that enables the robot to make precise actions in response to various surrounding *** with traditional neurological E-skin,our SMNE can maintain the softness and adaptability of biological synapses while perceiving multiple stimuli including force,temperature,and *** SMNE could promote the advancement of E-skins for intelligent robot applications.

关键词： electronic skin soft stretchable polymer semiconductor synaptic transistor multifunctional

Stretchable on-skin touchless screen sensor enabled by ionic hydrogel

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Nano Research 2024年第5期17卷 4462-4470页

作者： Tianxing Feng Dan Ling Chaoyue Li Wentao Zheng Shichuan Zhang Chang Li Artem Emel’yanov Alexander S.Pozdnyakov Lijun Lu yanchao mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China A.E.Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russian Federation

Screen sensors are the most commonly used human-machine interfaces in our everyday life,which have been extensively applied in personal electronics like *** screen sensors are attracting growing interest due to their distinct advantages of high interaction freedom,comfortability,and hand ***,the material compositions of current touchless screen sensors are rigid and fragile,hardly meeting the needs of wearable and stretchable on-skin electronics ***,these touchless screen sensors are also restricted by high power consumption,limited gesture types of recognition,and the requirement of light ***,we report a stretchable on-skin touchless screen sensor(OTSS)enabled by an ionic hydrogel-based triboelectric nanogenerator(TENG).Compared with current touchless screen sensors,the OTSS is stretchable,self-powered,and competent to recognize diverse gestures by making use of charges naturally carried on fingers without the need of sufficient light *** on-skin noncontact screen operating system is further demonstrated on the basis of the OTSS,which could unlock a cellphone interface in touchless operation mode on the human *** work for the first time introduces the on-skin touchless concept to screen sensors and offers a direction to develop new-generation screen sensors for future cellphones and personal electronics.

关键词： human-machine interface stretchable ionic hydrogel triboelectric nanogenerator self-powered sensor

缺位磷钨杂多阴离子PW_(11)O_(39)^(7-)电催化降解邻苯二甲酸二甲酯

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中山大学学报（自然科学版） 2011年第5期50卷 71-74页

作者：华英杰茅丹王崇太张为王婷婷毛彦超海南师范大学化学与化工学院海南海口571158 中山大学化学与化学工程学院广东广州510275

以Keggin型缺位磷钨杂多阴离子PW11O379-(PW11)为电催化剂,邻苯二甲酸二甲酯(DMP)为模型污染物,详细研究了PW11对DMP降解的电催化作用。实验结果表明,在pH=2.5,E=-0.6 V和60 ***-1O2流速下,0.05 mmol.L-1DMP反应120 min的降解率达96%,... 详细信息

以Keggin型缺位磷钨杂多阴离子PW11O379-(PW11)为电催化剂,邻苯二甲酸二甲酯(DMP)为模型污染物,详细研究了PW11对DMP降解的电催化作用。实验结果表明,在pH=2.5,E=-0.6 V和60 ***-1O2流速下,0.05 mmol.L-1DMP反应120 min的降解率达96%,总有机碳(TOC)去除约34%。DMP的电催化降解服从准一级反应动力学模型,准一级表观速率常数(kobs)与DMP的初始浓度有关,当DMP的初始浓度为0.05,0.2和0.3 mmol.L-1时,kobs分别为2.9×10-2,7.5×10-3和4.9×10-3min-1。

关键词：缺位杂多阴离子电催化降解邻苯二甲酸二甲酯矿化

碳中和背景下国内外陆地生态系统碳汇评估方法研究进展

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地学前缘 2023年第2期30卷 447-462页

作者：谢立军白中科杨博宇陈美景付帅毛艳超中国地质大学(北京)土地科学技术学院北京100083 自然资源部土地整治重点实验室北京100035 自然资源部矿区生态修复工程技术创新中心北京100083

研究目的:针对近30年森林、草地、农田、湿地4种生态系统主流碳汇核算方法,辨析各核算方法特点以准确地对陆地生态系统碳汇能力现状和未来碳汇潜力进行评估。研究方法:文献综述法、对比分析法和归纳法等。研究结果:(1)现有碳汇核算方法... 详细信息

研究目的:针对近30年森林、草地、农田、湿地4种生态系统主流碳汇核算方法,辨析各核算方法特点以准确地对陆地生态系统碳汇能力现状和未来碳汇潜力进行评估。研究方法:文献综述法、对比分析法和归纳法等。研究结果:(1)现有碳汇核算方法多基于公式模型计算,在进行植被碳汇空间格局分析时受样本数量、测量误差、参数误差、数据来源不一致、模型普适性差等因素影响,计算结果存在不确定性,中国统一标准的陆地生态系统碳汇监测体系亟待建立;(2)实现陆地生态系统碳汇量的准确计算,需要可靠数据源、合理的模型与计算方法、多途径的交叉验证、适当误差分析与插补校正;(3)应有效整合样地勘察、模型构建、微气象学和遥感监测等方法,评估陆地碳库的现存量与容量,揭示碳库稳定性及综合考虑碳库影响因素,以期解决生态系统多尺度耦合问题。研究结论:未来研究重点应基于大量实测数据,探究分类型、分地域、分气候的差异化碳汇核算方法,建立全尺度、广覆盖的碳汇计量模型,为中国陆地生态系统碳汇核算标准提供参考。

关键词：碳汇森林草地农田湿地陆地生态系统

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