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Regulating Thermogalvanic Effect and Mechanical Robustness via Redox Ions for Flexible Quasi‑Solid‑State Thermocells

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Nano-Micro Letters 2022年第5期14卷 153-167页

作者： Peng Peng Jiaqian Zhou Lirong Liang Xuan Huang Haicai Lv Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China

The design of power supply systems for wearable applications requires both flexibility and durability.Thermoelectrochemical cells(TECs)with large Seebeck coefficient can efficiently convert lowgrade heat into electricity,thus having attracted considerable attention in recent years.Utilizing hydrogel electrolyte essentially addresses the electrolyte leakage and complicated packaging issues existing in conventional liquid-based TECs,which well satisfies the need for flexibility.Whereas,the concern of mechanical robustness to ensure stable energy output remains yet to be addressed.Herein,a flexible quasisolid-state TEC is proposed based on the rational design of a hydrogel electrolyte,of which the thermogalvanic effect and mechanical robustness are simultaneously regulated via the multivalent ions of a redox couple.The introduced redox ions not only endow the hydrogel with excellent heat-to-electricity conversion capability,but also act as ionic crosslinks to afford a dual-crosslinked structure,resulting in reversible bonds for effective energy dissipation.The optimized TEC exhibits a high Seebeck coefficient of 1.43 mV K−1 and a significantly improved fracture toughness of 3555 J m^(−2),thereby can maintain a stable thermoelectrochemical performance against various harsh mechanical stimuli.This study reveals the high potential of the quasi-solid-state TEC as a flexible and durable energy supply system for wearable applications.

关键词： Thermocells Thermoelectric Flexible energy devices Wearable applications Hydrogel electrolytes

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Flexible nanocomposite electrodes with optimized hybrid structure for improved low-grade heat harvest via thermocells

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Science China Chemistry 2023年第6期66卷 1814-1823页

作者： Ziwei Mo Jiaqian Zhou Xin Lu Lirong Liang Fusheng Liu Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

Thermal energy is ubiquitous and constantly generated in nature and society.Thermocells(TECs)represent a promising energyconversion technology that can directly translate thermal energy into electricity with a large thermopower,thus having attracted considerable attention in recent years.Nevertheless,the use of noble platinum electrodes in TECs has substantially limited their widespread applications,as the scarcity of platinum element increases the cost of materials,and its intrinsic rigidity is not conducive to flexible and wearable applications under heat sources with complex surface geometry.Herein,we propose a facile hybridizing route to constructing flexible electrodes with optimized nanostructures.The flexible composite electrode is fabricated by decorating a single-walled carbon nanotube network with conducting polypyrrole nanospheres through controlled electrochemical deposition.With refined interfacial nanostructures,the resultant composite film can facilitate carrier transport/transfer at the electrolyte-electrode interface,and thereby shows superior overall thermoelectrochemical performance to noble platinum electrode.The TEC employing the flexible composite electrodes yields a maximum output power of 2.555μW under the temperature difference of 30 K,and a device comprising 6 TEC units is assembled to efficiently utilize waste heat and human body heat,revealing the high potential of low-grade heat harvesting.

关键词： nanocomposites thermocells carbon nanotubes polymers

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A Wavy-Structured Highly Stretchable Thermoelectric Generator with Stable Energy Output and Self-Rescuing Capability

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CCS Chemistry 2021年第10期3卷 2404-2414页

作者： Zhuoxin Liu Xiaodong Wang Shasha Wei Haicai Lv Jiaqian Zhou Peng Peng Hanfu Wang Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055 College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060 National Center for Nanoscience and Technology of China Beijing 100190

Thermoelectric generators(TEGs)demonstrate great potential for flexible and wearable electronics due to the direct electrical energy harvested from waste heat.Good wearability requires high mechanical flexibility and preferable stretchability,while current TEGs are primarily developed with rigid or non-stretchable components,which do not conform well to human skin or accommodate human motions,thus hindering further applications.

关键词： flexib le devic es thermoe lectrics energy conversion stretcha ble wearab le

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Controlled Cell Patterning on Bioactive Surfaces with Special Wettability

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Journal of Bionic Engineering 2017年第3期14卷 440-447页

作者： Xiaofeng zhou jiaqian Li Hongyan Sun Yi Hu Lufeng Che Zuankai Wang Science and Technology on Microsystem Laboratory Shanghai Institute of Microsystem and lnformation Technology Chinese Academy of Sciences Shanghai 200050 China Department of Mechanical and Biomedical Engineering City University of Hong Kong Hong Kong 999077 China Department of Biology and Chemistry City University of Hong Kong Hong Kong 999077 China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Multi-disciplinary Research Division Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing 100049 China College of Biomedical Engineering & Instrument Science Zhejiang University Hangzhou 310027 China

The ability to control cell patterning on artificial substrates with various physicochemical properties is of essence for important implications in cytology and biomedical fields. Despite extensive progress, the ability to control the cell-surface interaction is complicated by the complexity in the physiochemical features of bioactive surfaces. In particular, the manifesta- tion of special wettability rendered by the combination of surface roughness and surface chemistry further enriches the cell-surface interaction. Herein we investigated the cell adhesion behaviors of Circulating Tumor Cells （CTCs） on topog- raphically patterned but chemically homogeneous surfaces. Harnessing the distinctive cell adhesion on surfaces with different topography, we further explored the feasibility of controlled cell patterning using periodic lattices of alternative topographies. We envision that our method provides a designer＇s toolbox to manage the extracellular environment.

关键词： cell patterning wettability superhydrophilic surface chemistry circulating tumor cells

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Transcriptome Profiling of Abscisic Acid-Related Pathways in SNAC4/9-Silenced Tomato Fruits

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Transactions of Tianjin University 2021年第6期27卷 473-486页

作者： Yefang Liu Yanan Zhao Liping Chai Jiaqian Zhou Sen Yang Xiaohong Kou Zhaohui Xue School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China

The NAC(NAM,ATAF,and CUC)family is considered one of the largest families of plant transcription factor,and its members are involved in fruit ripening.Abscisic acid(ABA)has been demonstrated to modulate the fruit ripening process.By applying the virus-induced gene silencing method and next-generation sequencing technology,we conducted a compara-tive analysis of the eff ects of SNAC4(SlNAC48,accession number:NM 001279348.2)and SNAC9(SlNAC19,accession number:XM 004236996.2)on tomato fruit ripening.The results of high-throughput sequencing identified 1262 significant(p1.0)related to ABA in SNAC4-silenced and SNAC9-silenced tomatoes,respectively,for further analysis.The XET gene and two other genes(E8 and EXP1)were significantly down and upregulated in SNAC4-silenced tomatoes,respectively.However,the PYL9 gene and four other genes(PP2C,CYP707A2,EXPA6,and ACS6)were significantly down and upregulated in SNAC9-silenced tomatoes,respectively.In addition,ten DEGs were selected for use in tests to confirm the accuracy of the transcriptomic results by quantitative real-time polymerase chain reaction(qRT-PCR).Our results highlight the relationship between SNAC4/9 and ABA in the regulation of tomato ripening,which may help provide a theoretical basis for further research on the mechanisms of tomato fruit ripening and senescence.

关键词： Tomato RNA sequencing NAC transcription factor Virus-induced gene silencing Abscisic acid

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Control and Patterning of Various Hydrophobic Surfaces:Insitu Modification Realized by Flexible Atmospheric Plasma Stamp Technique

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Journal of Bionic Engineering 2020年第3期17卷 436-447页

作者： Nan Zhang Chun Huang jiaqian Li Ling Kang Huanxi Zheng Yaqin He Zuankai Wang Xiaofeng zhou Jian Zhang Shanghai Key Laboratory of Multidimensional Information Processing School of Communication and Electronic EngineeringEast China Normal UniversityShanghai 200241China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Shanghai Institute of Intelligent Electronics Systems Fudan UniversityShanghai 200433China

Wettability plays a vital role in fundamental researches and practical applications.Wettability control and patterning have been widely studied in various fields.Although researches have grown rapidly,the methods are still restricted by limitations including complicated processes,high equipment requirements and shortage of methods to treat complex surfaces.Here we report a simple,low cost,array-based wettability control and patterning method via in-situ modification by flexible plasma stamp.Wettability control and patterning on surfaces of superhydrophobic aluminum,superhydrophobic PDMS and silicon,even plant leaf and fruit are achieved.The relationships between the wettability and the treatment time are investigated.We elucidate that the wetting states can also be reversible.The surface modification mechanism of in-situ plasma treatment is further investigated.Utilizing the step by step treatment,gradient and arbitrary wettability patterning on surfaces have been obtained.Notably,the patterned wettability on the inner surface of a tube has been realized,which has never been reported.Finally,in-situ wettability patterning is applied to achieve microfluidics channels on the inner surface of superhydrophobic tube.This work will bring new insights into the study of wetting field and stimulate more applications on wettability control and patterning.

关键词： wettability control patterning in-situ modification flexible plasma stamp atmospheric

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LPS-induced mitochondrial DNA synthesis and release facilitate RAD50-dependent acute lung injury

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Signal Transduction and Targeted Therapy 2021年第4期6卷 1104-1106页

作者： Xueqin Zhan Rui Cui Xinwei Geng jiaqian Li Yunlian zhou Lulu He Chao Cao Chao Zhang Zhimin Chen Songmin Ying Department of Pulmonology Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthNational Children's Regional Medical CenterHangzhouZhejiangChina International Institutes of Medicine the Fourth Affiliated Hospital of Zhejiang University School of MedicineYiwuChina Department of Pharmacology and Department of Respiratory and Critical Care Medicine of the Second Affiliated Hospital Zhejiang University School of MedicineKey Laboratory of Respiratory Disease of Zhejiang ProvinceHangzhouZhejiangChina

Dear Editor,ATP-binding cassette(ABC)-ATPase(RAD50),together with meiotic recombination 11 homolog 1(MRE11)subunits,to form MRE11-RAD50 complex,plays important roles in recognition of double-stranded DNA(dsDNA)and initiation of consequent inflammatory cascade1.Acute lung injury(ALI)and acute respiratory destress syndrome(ARDS)are systemic uncontrolled inflammation and life-threatening.However,the function of the DNA sensor in ALI/ARDS remains poorly defined.Here we investigated functions of RAD50 using mouse primary macrophages and conditionally RAD50 knockout mice in vitro and in a lipopolysaccharide(LPS)-induced lung injury model.

关键词： RAD50 acute lung

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Probiotics and Their Metabolites Ameliorate Inflammatory Bowel Disease:A Critical Review

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Infectious Microbes & Diseases 2021年第1期3卷 4-13页

作者： Ying Liang Manman Liu jiaqian Pu Zichun Zhu Zining Gao Qingqing zhou Qing Gu Ping Li Key Laboratory for Food Microbial Technology of Zhejiang Province College of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhouZhejiangChina.

Crohn disease and ulcerative colitis are the two main manifestations of inflammatory bowel disease(IBD),and both are highly morbid.However,the precise etiology of IBD is still unknown and effective therapeutics are yet to be discovered.It is becoming increasingly clear that a combination of factors,including genetic background,host immune response,and microbial reduced diversity status are related to IBD.The cardinal symptom of IBD patients is the imbalance of the intestinal microflora.According to previous studies,both probiotics and symbiotic microbiota can play a protective role through intestinal micro-ecosystem regulation,epithelial barrier integrity enhancement,and inflammation reduction.Therefore,probiotics can provide an alternative or auxiliary method to traditional IBD treatment.Here,we reviewed the possible pathogenesis of IBD,summarized the possible mechanisms of probiotics modulation of IBD,and emphasized the prevention and treatment targets of probiotics-mediated IBD,with the aim to provide theoretical support for the treatment of IBD patients by probiotics in clinical trials.

关键词： inflammatory bowel disease metabolites probiotics the regulatory mechanism

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Charge Engineering of Mo2C@Defect-Rich N-Doped Carbon Nanosheets for Efficient Electrocatalytic H2 Evolution

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Nano-Micro Letters 2019年第3期11卷 155-164页

作者： Chunsheng Lei Wen zhou Qingguo Feng Yongpeng Lei Yi Zhang Yin Chen jiaqian Qin State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083People’s Republic of China College of Environmental and Safety Engineering Changzhou UniversityChangzhou213164People’s Republic of China Key Laboratory of Advanced Technologies of Materials Ministry of Educationand Institute of MaterialsDynamicsSouthwest Jiaotong UniversityChengdu610031SichuanPeople’s Republic of China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and ChemicalEngineeringCentral South UniversityChangsha410083People’s Republic of China Metallurgy and Materials Science Research Institute Chulalongkorn UniversityBangkok10330Thailand

Charge engineering of carbon materials with many defects shows great potential in electrocatalysis,and molybdenum carbide(Mo2C)is one of the noble-metal-free electrocatalysts with the most potential.Herein,we study the Mo2C on pyridinic nitrogen-doped defective carbon sheets(MoNCs)as catalysts for the hydrogen evolution reaction.Theoretical calculations imply that the introduction of Mo2C produces a graphene wave structure,which in some senses behaves like N doping to form localized charges.Being an active electrocatalyst,MoNCs demonstrate a Tafel slope as low as 60.6 mV dec-1 and high durability of up to 10 h in acidic media.Besides charge engineering,plentiful defects and hierarchical morphology also contribute to good performance.This work underlines the importance of charge engineering to boost catalytic performance.

关键词： Molybdenum carbide Nitrogen-doped carbon nanosheets Charge engineering Graphene wave Hydrogen evolution reaction

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Synthesis and Supercapacitors Properties of Coordination Polymers based on {P2W18}

Synthesis and Supercapacitors Properties of Coordination Pol...

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中国化学会第十届全国无机化学学术会议

作者： jiaqian Gao Lige Gong Kai Yu Baibin zhou Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education Harbin Normal University

People have the higher and higher demand for energy storage with the rapid development of the world economy. Supercapacitor attractsmore attentions in the application fields of accumulation energy as a kind of newfashioned energy device. In this paper, [K{Ag(bim)}(PWO)](bim=biimidazole)(1) was successfully synthesized by hydrothermal method. X-ray diffractionan analysis revealed that compound 1 consists of one [PWO], [Ag(bim)] units and K ions. The [PWO] is surrounded by six K and interfacing [PWO] is linked by two K to form 1D chains. 2D layer was formed by the adjacent chains with K-O bond, and neighboring layers are further extended through the Ag-O bond to the interpenetrating 3D framework(Fig.1 a). Scanning Electron Microscope(SEM) showed that compound 1 has the morphology of like rhombus shape(Fig.1 b). Compound 1 was applied as electrode material for testing cyclic voltammetry(CV), galvanostatic charge/discharge(GCD) to estimate supercapacitor. As shown in Fig.1 c, there were two pairs obvious redox peaks which can be attributed to electron transfer of W/W. GCD curves indicated specific capacitance of 975.4 F g at a current density of 2 A g(Fig.1 d).

关键词： [P2W18O62]6- hydrothermal method supercapacitor

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