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Rational design of biodegradable semiconducting polymer nanoparticles for NIR-II fluorescence imaging-guided photodynamic therapy

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Nano Research 2024年第6期17卷 5399-5408页

作者： Xuxuan Gu Jinlong Shen Zhiwei Xu Wenqi Wang Ying Wu Wen Zhou Chen Xie Quli Fan State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China

Semiconducting polymer nanoparticles(SPNs)have shown great promise in second near-infrared window(NIR-II)***,the issue of long metabolic time significantly restricts the clinical application of *** this study,we rationally designed a biodegradable SPN(BSPN50)for NIR-II fluorescence imaging-guided photodynamic therapy(PDT).BSPN50 is prepared by encapsulating a biodegradable SP(BSP50)with an amphiphilic copolymer ***50 is composed of NIR-II fluorescent diketopyrrolopyrrole(DPP)segment and degradable poly(phenylenevinylene)(PPV)segment with the ratio of 50/***50 has both satisfactory degradability under myeloperoxidase(MPO)/hydrogen peroxide(H_(2)O_(2))and NIR-II fluorescence emission upon 808 nm laser ***,BSPN50 shows good photodynamic efficacy under 808 nm laser ***50 shows a faster degradation rate than BSPN100 which has no PPV segment both in vitro and in *** addition,BSPN50 can effectively diagnose tumor via NIR-II fluorescence imaging and inhibit the tumor growth by ***,our study provides a rational approach to construct biodegradable nanoplatforms for efficient tumor NIR-II phototheranostics.

关键词： near-infrared(NIR)-II fluorescence imaging semiconducting polymer nanoparticles photodynamic therapy tumor imaging

Ensuring consistency of Web services transaction

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 59-66页

作者： WANG Xiao-jun LI Yang-qun WU Xiao-mei MIN Li-juan Institute of Information and Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China Foreign Languages Office Nanjing Institute of Politics Nanjing 210003 China

Composite Web services provide promising prospects for conducting cross-organizational Web service transactions. Such transactions generally require longer processing time and manipulate financially critical data. To efficiently manage these Web services transactions, isolation is commonly relaxed, but inconsistency will be caused by concurrently executing isolation-relaxing transactions. This article proposes an extension to the WS-Business Activity Protocol, which ensures the consistent executions of isolation-relaxing Web service transactions, and which is based on transaction dependency graphs distributed over multiple nodes. Furthermore, this article presents several algorithms implementing the protocol, and introduces the implement of a prototype system.

关键词： Web services transaction model transaction management protocol consistency

Light-modulated electron retroreflection and Klein tunneling in a graphene-based n-p-n junction

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Chinese Physics B 2022年第4期31卷 629-633页

作者： Xingfei Zhou Ziying Wu Yuchen Bai Qicheng Wang Zhentao Zhu Wei Yan Yafang Xu New Energy Technology Engineering Laboratory of Jiangsu Province School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China College of Physics science and Technology Yangzhou UniversityYangzhou 225002China

We investigate the electron retroreflection and the Klein tunneling across a graphene-based n-p-n junction irradiated by linearly polarized off-resonant light with the polarization along the x *** linearly polarized off-resonant light modifies the band structure of graphene,which leads to the anisotropy of band *** adjusting the linearly polarized light and the direction of n-p-n junction simultaneously,the electron retroreflection appears and the anomalous Klein tunneling,the perfect transmission at a nonzero incident angle regardless of the width and height of potential barrier,happens,which arises from the fact that the light-induced anisotropic band structure changes the relation of wavevector and velocity of *** finding provides an alternative and flexible method to modulate electron retroreflection and Klein tunneling.

关键词： linearly polarized light electron retroreflection Klein tunneling graphene

Carbon dots modified nanoflower petals with super enhanced nitrogen electro-reduction efficiency

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Chinese Chemical Letters 2023年第6期34卷 406-411页

作者： Yang Zhou Xuanzhao Lu Yu-chung Chang Yanwen Ma Linlin Wang Jianrong Zhang Junjie Zhu State Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials IAM Nanjing University of Posts&TelecommunicationsNanjing 210023China State Key Laboratory of Analytical Chemistry for Life science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164United States

Nitrogen electro-reduction reaction(NERR)is a promising alternative method for ammonia production to the Haber-Bosch approach due to mild reaction conditions and free harmful by-product emission.A formidable challenge in bringing NERR closer to the practical application is developing an electrocatalyst which can simultaneously improve the Faraday efficiency and reduce the reaction ***,we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals(Cu Po-NCDs NF)via a self-assembly *** flower structure endowed the Cu Po-NCDs NF with large specific surface area,and thus enabled more active sites to be *** particular,we demonstrated that the NCDs modified Cu Po petals with flower-like structure can accelerate the interfacial proton-electron transfer,suppressing the competing hydrogen evolution reaction and promoting the desired NERR ***,for the CuPo-NCDs NF catalyzed NERR,the FE_(NH_(3))and the reaction potential both were boosted,the resultant energy efficiency of NERR reached a record-breaking value of 56.5%,and the NH_(3)yield rate increased by 7 times compared to *** study provides a novel catalyst with a new pathway to boost the NERR.

关键词： Nitrogen-doped carbon dots Nano-flower Self-assembly Interfacial proton-electron transfer Nitrogen electro-reduction

Advances of Electrochemical and Electrochemiluminescent Sensors Based on Covalent Organic Frameworks

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Nano-Micro Letters 2024年第2期16卷 395-422页

作者： Yue Cao Ru Wu Yan‑Yan Gao Yang Zhou Jun‑Jie Zhu Key Laboratory for Organic Electronics and Information Displays(KLOEID)and Institute of Advanced Materials(IAM) Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023People’s Republic of China State Key Laboratory of Analytical Chemistry for Life science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023People’s Republic of China

Covalent organic frameworks(COFs),a rapidly developing category of crystalline conjugated organic polymers,possess highly ordered structures,large specific surface areas,stable chemical properties,and tunable pore *** the first report of boroxine/boronate ester-linked COFs in 2005,COFs have rapidly gained popularity,showing important application prospects in various fields,such as sensing,catalysis,separation,and energy *** them,COFs-based electrochemical(EC)sensors with upgraded analytical performance are arousing extensive *** this review,therefore,we summarize the basic properties and the general synthesis methods of COFs used in the field of electroanalytical chemistry,with special emphasis on their usages in the fabrication of chemical sensors,ions sensors,immunosensors,and ***,the emerged COFs in the electrochemiluminescence(ECL)realm are thoroughly covered along with their preliminary ***,final conclusions on state-of-the-art COFs are provided in terms of EC and ECL sensors,as well as challenges and prospects for extending and improving the research and applications of COFs in electroanalytical chemistry.

关键词： Covalent organic frameworks Electrochemistry Electrochemiluminescence Sensors

Linear precoding based on a non-ideal Nakagami-m channel in a massive MIMO system

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science China(Information sciences) 2017年第6期60卷 266-268页

作者： Jianxin DAI Jun WANG Chonghu CHENG Ming CHEN Jin ZHOU School of science Nanjing University of Posts and Telecommunications College of Telecommunication & Information Engineering Nanjing University of Posts and Telecommunications National Mobile Communications Research Laboratory Southeast University

Dear editor,Large scale multiple-input multiple-output(MIMO)is one of key technologies for next generation mobile communication[1–4].However,in multiple user environments,multiple user interference(MUI)increases with the rise of the number of *** present,one way to eliminate the MUI is to use precoding technology in the base station(BS),which involves BS preprocessing of

关键词： MIMO IEEE Linear precoding based on a non-ideal Nakagami-m channel in a massive MIMO system

Trust Evaluation Model Based on PSO and LSTM for Huge Information Environments

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Chinese Journal of Electronics 2021年第1期30卷 92-101页

作者： ZHANG Lin HUANG Yanwen XUAN Jie FU Xiong LIN Qiaomin WANG Ruchuan College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks

Due to the challenge of increasing data volume, the traditional trust model is unable to manage data with high efficiency and effectively extract useful information hidden in big data. To fully utilize big data and combine machine learning with trust evaluation, a trust evaluation model based on Long short-term memory(LSTM) is presented. The powerful learning ability,expressive ability and dynamic timing of LSTM can be applied to study data while avoiding the vanishing and exploding gradient phenomena of traditional Recurrent neural networks(RNNs) to ensure that the model can learn sequences of random length and provide accurate trust evaluation. Targeting the performance instability caused by the LSTM model’s random initialization of weights and thresholds, Particle swarm optimization(PSO), one of the intelligent algorithms, is introduced to find global optimal initial weights and *** proved that the trust model proposed in this paper has high accuracy and contributes a new idea for trust evaluation in big data environments.

关键词： LSTM model accurate trust evaluation traditional trust model vanishing particle swarm optimisation exploding gradient phenomena Long short-term memory big data environments huge information Big Data traditional Recurrent neural networks recurrent neural nets data volume powerful learning ability neural nets learning (artificial intelligence) trust evaluation model machine learning PSO

Strain-modulated anisotropic Andreev reflection in a graphene-based superconducting junction

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Chinese Physics B 2022年第11期31卷 542-547页

作者： Xingfei Zhou Ziming Xu Deliang Cao Fenghua Qi New Energy Technology Engineering Laboratory of Jiangsu Province School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China

We investigate the Andreev reflection across a uniaxial strained graphene-based superconducting *** with pristine graphene-based superconducting junction,three opposite properties are ***,in the regime of the interband conversion of electron–hole,the Andreev retro-reflection ***,in the regime of the intraband conversion of electron–hole,the specular Andreev reflection ***,the perfect Andreev reflection,electron–hole conversion with unit efficiency,happens at a nonzero incident angle of *** three exotic properties arise from the strain-induced anisotropic band structure of graphene,which breaks up the original relation between the direction of velocity of particle and the direction of the corresponding *** finding gives an insight into the understanding of Andreev reflection and provides an alternative method to modulate the Andreev reflection.

关键词： graphene uniaxial strain anisotropic Andreev reflection

Anisotropic refraction and valley-spin-dependent anomalous Klein tunneling in a 1T'-MoS_(2)-based p–n junction

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Chinese Physics B 2022年第7期31卷 505-508页

作者： Fenghua Qi Xingfei Zhou School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China New Energy Technology Engineering Laboratory of Jiangsu Province School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China

We investigate the transport properties of electron in a 1T'-MoS_(2)-based p–n *** anisotropic refraction of electron is found when the electron beam crosses the p–n junction,which brings the phenomenon of valley splitting without any external ***,it is found that the valley-spin-dependent anomalous Klein tunneling,i.e.,the perfect transmission exists at a nonzero incident angle of valley-spin-dependent electron,happens when the vertical electric field is equal to the critical electric *** two peculiar properties arise from the same reason that the tilted band structure makes the directions of wavevector and velocity *** work designs a special valley splitter without any external fields and finds a new type of Klein tunneling.

关键词： 1T'-MoS_(2) anisotropic refraction valley splitting Klein tunneling