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Wittgenstein on Reading

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Frontiers of Philosophy in China 2021年第1期16卷 67-85页

作者： francis Yunqing lin School of English Beijing International Studies UniversityBeijing 100024China

The section on reading occupies quite a large amount of space in the Philosophical Investigations(PI)and Wittgenstein makes little changes to it in the course of composing the *** shows that the section on reading is *** paper analyzes Wittgenstein’s treatment of the philosophical problem of reading in *** shows that Wittgenstein rejects six philosophical ideas about what reading is and employs three different *** paper also shows that the section on reading is not only important for grasping Wittgenstein’s discussion on understanding,but also for comprehending the whole of PI.

关键词： reading understanding family-resemblance word use philosophical problem dissolution

Recent advances in acoustofluidic separation technology in biology

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Microsystems & Nanoengineering 2022年第5期8卷 1-16页

作者： Yanping Fan Xuan Wang Jiaqi Ren francis lin Jiandong Wu School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Physics and Astronomy University of ManitobaWinnipegMB R3T 2N2Canada

Acoustofluidic separation of cells and particles is an emerging technology that integrates acoustics and *** the last decade,this technology has attracted significant attention due to its biocompatible,contactless,and labelfree *** has been widely validated in the separation of cells and submicron bioparticles and shows great potential in different biological and biomedical *** review first introduces the theories and mechanisms of acoustofluidic ***,various applications of this technology in the separation of biological particles such as cells,viruses,biomolecules,and exosomes are ***,we discuss the challenges and future prospects of this field.

关键词： fluid separation acoustics

The Potential Game-Changer:A Concept-to-Proof Study on D:A Heterojunction-Free Organic Photovoltaics

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Chinese Journal of Chemistry 2024年第3期42卷 252-258页

作者： Lijian Zuo Sae Byeok Jo Xueliang Shi francis lin Alex Jen State Key Laboratory of Silicon and Advanced Semiconductor Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang310058 China Department of Materials Science and Engineering University of WashingtonSeattleWAUSA School of Chemical Engineering Sungkyunkwan University (SKKU)Suwon16419 Republic of Korea School of Chemistry and Molecular Engineering East China Normal UniversityShanghai200062 China Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Department of Chemistry City University of Hong KongKowloonHong KongChina Hong Kong Institute for Clean Energy Hong KongChina

Since 1986,the donor-acceptor (D:A) heterojunction has been regarded a necessity for high-efficiency organic photovoltaics (OPVs),due to its unique advantage in compensating the intrinsic limitations of organic semiconductors,such as high exciton binding energy and poor ambipolar charge mobility. While this adversely causes tremendous non-radiative charge recombination and instability issues,which currently become the most critical limits for commercialization of OPVs. Here,we present a concept-to-proof study on the potential of D:A heterojunction free OPV by taking advantage of recent progress of non-fullerene acceptors. First,we demonstrate that the “free carriers” can be spontaneously generated upon illumination in an NFA,i.e.,the 6TIC-4F single layer. Second,the 6TIC-4F layer also exhibits good ambipolar charge transporting property. These exceptional characteristics distinguish it from the traditional organic semiconductors,and relieve it from the reliance of D:A heterojunction to independently work as active layer. As a result,the subsequent OPV by simply sandwiching the 6TIC-4F layer between the cathode and anode yields a considerably high power conversion efficiency ~1%. Moreover,we find the D:A heterojunction free device exhibits two order of magnitude higher electroluminescence quantum efficiency and significantly reduced VOC loss by 0.16 eV compared to those of the D:A BHJ structure,validating its promise for higher efficiency in the future. Therefore,our work demonstrates the possibility of using D:A heterojunction-free device structure for high performance,that can potentially become the next game changer of OPV.

关键词： Organic solar cells Spontaneous charge generation Ambipolar charge transport Charge recombination Perovskite-like organic semiconductor Schottky-junction structure Single component

3D free-assembly modular microfluidics inspired by movable type printing

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Microsystems & Nanoengineering 2023年第5期9卷 191-201页

作者： Shaoqi Huang Jiandong Wu Lulu Zheng Yan Long Junyi Chen Jianlang Li Bo Dai francis lin Songlin Zhuang Dawei Zhang Engineering Research Center of Optical Instrument and System the Ministry of EducationShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Physics and Astronomy University of ManitobaWinnipegMB R3T 2N2Canada

Reconfigurable modular microfluidics presents an opportunity for flexibly constructing prototypes of advanced microfluidic ***,the strategy of directly integrating modules cannot easily fulfill the requirements of common applications,e.g.,the incorporation of materials with biochemical compatibility and optical transparency and the execution of small batch production of disposable chips for laboratory trials and initial ***,we propose a manufacturing scheme inspired by the movable type printing technique to realize 3D free-assembly modular ***-layer 3D microfluidic structures can be produced by replicating the assembled molds.A library of modularized molds is presented for flow control,droplet generation and manipulation and cell trapping and *** addition,a variety of modularized attachments,including valves,light sources and microscopic cameras,have been developed with the capability to be mounted onto chips on *** systems,including those for concentration gradient generation,droplet-based microfluidics,cell trapping and drug screening,are *** scheme enables rapid prototyping of microfluidic systems and construction of on-chip research platforms,with the intent of achieving high efficiency of proof-of-concept tests and small batch manufacturing.

关键词： batch proof mounted

Hole-Selective Contact with Molecularly Tailorable Reactivity for Passivating High-Performing Inverted Perovskite Solar Cells

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CCS Chemistry 2024年第7期6卷 1654-1661页

作者： Wenlin Jiang Yingie Hu Fengzhu Li francis R.lin Alex K-Y.Jen Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong China 999077 Department of Chemistry City University of Hong KongKowloonHong Kong China 999077 Hong Kong Institute for Clean Energy City University of Hong KongKowloonHong Kong China 999077 State Key Laboratory of Marine Pollution City University of Hong KongKowloonHong Kong China 999077

The precisely customizable attributes of self-assembled monolayers(SAMs)molecules at the atomic level hold the potential to facilitate efficient hole selection and interface passivation ***,the correlation between the exposure of passivating groups on the surface and device performance remains ***,we introduce two newly designed SAM molecules,Cbz2S and Cbz2SMe,incorporating cyclic disulfide or two flanking thiomethyls by modifying the 4,5-position of carbazole to adjust the Lewis basicity of the SAM-modified *** possessing suitable energetic alignment,Cbz2S with more-exposed sulfur atoms exhibited inferior device performance due to excessive reactivity,leading to an overpopulation of PbI2 crystallites at the buried perovskite *** contrast,the screening effect from the methyl groups of Cbz2SMe optimized SAM reactivity,exquisitely integrating buried interface passivation and hole selection ***,the champion inverted perovskite solar cell(PSC)employing Cbz2SMe achieved an impressive power conversion efficiency of 24.42%,accompanied by prolonged *** work demonstrates the feasibility of incorporating Lewis-basic passivation groups into SAM molecules and elucidates the relationship between the reactivity of SAM passivation groups and device *** findings provide valuable insights for the design of novel multifunctional SAM molecules,further advancing the performance of PSCs.

关键词： self-assembled monolayer perovskite solar cell hole-selective layer carbazole derivatives defect passivation

Broadband photomultiplication-type polymer photodetectors and its application in light-controlled circuit

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Science China Chemistry 2022年第8期65卷 1642-1649页

作者： Ming Liu Qunping Fan Kaixuan Yang Zijin Zhao Xingchao Zhao Zhengji Zhou Jian Zhang francis lin Alex K.-Y.Jen Fujun Zhang Key Laboratory of Luminescence and Optical Information Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China Department of Chemistry City University of Hong KongHong Kong 999077China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Key Lab for Special Functional Materials Ministry of EducationNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand School of MaterialsHenan UniversityKaifeng 475004China Guangxi Key Laboratory of Information Materials School of Material Science and TechnologyGuilin University of Electronic TechnologyGuilin 541004China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering University of WashingtonWashington 98195-2120United States Hong Kong Institute for Clean Energy City University of Hong KongHong Kong 999077China

Photomultiplication-type polymer photodetectors(PM-PPDs)were achieved with polymer P3HT as donor and PY3Se-1V as acceptor based on structure of ITO/PEDOT:PSS/active layer/*** optimal weight ratio of P3HT to PY3Se-1V is about 100:*** of isolated electron traps are formed with PY3Se-1V surrounded by P3HT due to rather less content of PY3Se-1V in active layers and about 0.94 e V energy offset between the lowest unoccupied molecular orbitals(LUMO)of P3HT and *** optimal PM-PPDs exhibit broad spectral response from 350 to 950 nm and external quantum efficiency(EQE)values of68,200%at 360 nm,26,400%at 630 nm and 19,500%at 850 nm under-15 V *** working mechanism of PM-PPDs is attributed to the interfacial trap-assisted hole tunneling injection from external *** performance of PM-PPDs can be further improved by incorporating appropriate PMBBDT with high hole mobility as the third *** EQE values of optimal ternary PM-PPDs are increased to 105,000%at 360 nm,40,000%at 630 nm and 31,800%at 850 nm under-15 V bias,benefiting from the enhanced hole transport in ternary active *** optimal ternary PM-PPDs were successfully applied in a light-controlled circuit to turn on or turn off light emitting diode(LED).

关键词： polymer photodetectors photomultiplication external quantum efficiency broadband

16.3%Efficiency binary all-polymer solar cells enabled by a novel polymer acceptor with an asymmetrical selenophene-fused backbone

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Science China Chemistry 2022年第2期65卷 309-317页

作者： Huiting Fu Qunping Fan Wei Gao Jiyeon Oh Yuxiang Li francis lin Feng Qi Changduk Yang Tobin J.Marks Alex K.-Y.Jen Department of Materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina Department of Chemistry City University of Hong KongKowloon 999077Hong KongChina Department of Energy Engineering School of Energy and Chemical EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)50 UNIST-gilUlju-gunUlsan 44919Republic of Korea Department of Materials Science and Engineering University of WashingtonSeattleWashington 98195-2120USA Department of Chemistry and the Materials Research Center Northwestern UniversityEvanstonIL60208USA Institute for Advanced Studies City University of Hong KongKowloon 999077Hong KongChina

Despite the significant progress made recently in all-polymer solar cells(all-PSCs),it is still quite challenging to achieve high open-circuit voltage(V_(oc))and short-circuit current density(J_(sc))simultaneously in order to further improve their *** recent strategy of using selenophene to replace thiophene on the Y6 based polymer acceptors has resulted in significantly improved J_(sc)s of the resulting ***,such modifications have also depressed V_(oc),which compromises the overall performance of the ***,we present the design and synthesis of a novel polymer acceptor,PYT-1S1Se,created by inserting an asymmetrical selenophene-fused framework to precisely manipulate optical absorption and electronic *** with the selenium-free analog,PYT-2S,and symmetrical selenium-fused analog,PYT-2Se,the PYT-1S1Se derived all-PSCs not only deliver optimized J_(sc)(24.1 mA cm^(−2))and V_(oc)(0.926 V)metrics,but also exhibit a relatively low energy loss of 0.502 ***,these devices obtain a record-high power conversion efficiency(PCE)of 16.3%in binary *** work demonstrates an effective molecular design strategy for balancing the trade-off between V_(oc) and J_(sc) to achieve highefficiency all-PSCs.

关键词： all-polymer solar cells polymer acceptors asymmetrical selenophene-fused backbone power conversion efficiencies stability

Self-assembled monolayers as emerging hole-selective layers enable high-performance thin-film solar cells

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The Innovation 2023年第1期4卷 26-27页

作者： Mingliang Li Yunfei Xie francis R.lin Ziwei Li Shuang Yang Alex K.-Y.Jen College of Materials Science and Engineering Hunan UniversityChangshaHunan 410082China Department of Materials Science and Engineering Department of ChemistryHong Kong Institute for Clean EnergyCity University of Hong KongHong Kong 999077China School of Materials Science and Engineering East China University of Science and TechnologyShanghai 200237China

Since human society has been rapidly industrializing over the past century,excessive energy consumption and environmental damage have raised awareness of the need for clean,renewable energy *** after the outbreak of the Russian-Ukrainian war,the development of alternative energy issue has been elevated to an unprecedented strategic *** energy,as one of the clean and renewable energies,is experiencing a historical stage of changing its role from supplementary energy to alternative *** exploration of photovoltaic(PV)cells with newmaterials and structures is urgent tomeet the demand of achieving carbon-peak and carbon-neutralization goals.

关键词： elevated enable raised

Label-free 3D computational imaging of spermatozoon locomotion, head spin and flagellum beating over a large volume

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Light(Science & Applications) 2017年第1期6卷 300-310页

作者： Mustafa Ugur Daloglu Wei Luo Faizan Shabbir francis lin Kevin Kim Inje Lee Jia-Qi Jiang Wen-Jun Cai Vishwajith Ramesh Meng-Yuan Yu Aydogan Ozcan Electrical and Computer Engineering Department University of CaliforniaLos AngelesCA 90095USA Bioengineering Department University of CaliforniaLos AngelesCA 90095USA California NanoSystems Institute(CNSI) University of CaliforniaLos AngelesCA 90095USA Chemistry and Biochemistry Department University of CaliforniaLos AngelesCA 90095USA Department of Physics and Astronomy University of CaliforniaLos AngelesCA 90095USA Department of Mathematics University of CaliforniaLos AngelesCA 90095USA Computer Science Department University of CaliforniaLos AngelesCA 90095USA Department of Surgery David Geffen School of MedicineUniversity of CaliforniaLos AngelesCA 90095USA

We report a high-throughput and label-free computational imaging technique that simultaneously measures in three-dimensional(3D)space the locomotion and angular spin of the freely moving heads of microswimmers and the beating patterns of their flagella over a sample volume more than two orders-of-magnitude larger compared to existing optical *** this platform,we quantified the 3D locomotion of 2133 bovine sperms and determined the spin axis and the angular velocity of the sperm head,providing the perspective of an observer seated at the moving and spinning sperm *** this constantly transforming perspective,flagellum-beating patterns are decoupled from both the 3D translation and spin of the head,which provides the opportunity to truly investigate the 3D spatio-temporal kinematics of the *** addition to providing unprecedented information on the 3D locomotion of microswimmers,this computational imaging technique could also be instrumental for micro-robotics and sensing research,enabling the high-throughput quantification of the impact of various stimuli and chemicals on the 3D swimming patterns of sperms,motile bacteria and other micro-organisms,generating new insights into taxis behaviors and the underlying biophysics.

关键词： flagellar motion holography on-chip microscopy sperm head spin sperm tracking