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Emerging monoelemental 2D materials(Xenes)for biosensor applications

Nano Research 2023年第5期16卷 7030-7052页

作者： Xiaohan Duan Zhihao Liu Zhongjian Xie ayesha khan tareen Karim khan Bin Zhang Han Zhang Key Laboratory of Optoelectronic Devices Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic Engineering and Institute of Translational MedicineFirst Affiliated Hospital(Shenzhen Second People’s Hospital)Health Science CenterShenzhen UniversityShenzhen 518060China Institute of Pediatrics Shenzhen Children’s HospitalShenzhen 518038China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China School of Electrical Engineering&Intelligentization Dongguan University of TechnologyDongguan 523808China

Currently,numerous monoelemental two-dimensional(2D)materials,called Xenes,have been discovered,including graphyne(GD),silicene,germanene,arsenene,borophene.Their structures,fabrication methods,as well as properties have been extensively explored.Based on their single-element composition,high optical response capability,excellent electrical-optical properties,large specific surface area(SSA)and easy modification,Xenes have been widely used in photoelectric applications(detection,modulation,light processing)and biomedicine(biological sensing,drug loading,bioimaging,etc.).Especially in the field of biomedicine,Xenes are expected to induce a great breakthrough.In this review,we introduce the structural characteristics,synthesis and modification methods of several common Xenes respectively.The general properties including optical,electronic,physical and chemical properties of Xenes are summarized.Their diverse utilization as biosensors for nucleic acid sequencing,bioactive detection,cancer diagnosis,etc.are also explicitly explored.Finally,the challenges and future perspectives of Xenes in biosensor are discussed.

关键词： Xenes fabrication method general properties biosignal detection biosensors

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Variable range hopping transport and dielectric relaxation mechanism in GdCrO3 rare-earth orthochromite perovskite

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Journal of Rare Earths 2024年第7期42卷 1304-1316页

作者： Muhammad Javed Ayaz Arif khan Jamal Kazmi Naeem Akbar Said Nasir Khisro Amanullah Dar Aleem Dad khan tareen Mohd Ambri Mohamed Department of Physics The University of Azad Jammu and Kashmir Department of Physics University of Kotli Azad Jammu and Kashmir Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Department of Mathematics University of Kotli Azad Jammu and Kashmir

The polycrystalline GdCrO3（GCO） perovskite orthochromite was synthesized by the sol-gel autocombustion method.The Rietveld refined X-ray diffraction（XRD） profile of GCO confirms that the orthorhombic phase crystallizes in perovskite crystal structure with space group Pbnm.The transmission electron microscopy and selected area electron diffraction divulge the polycrystalline nature of the perovskite chromite.The field emission scanning electron microscopy（FESEM） images reveal the micro structural polyhedral growth of grains separated by sharp grain boundaries.The chemical states of the ions present in the compound were investigated by X-ray photoelectron spectroscopy（XPS） studies,and the electrical pathways were identified.Complex impedance studies were carried out in the experimental frequency and temperature ranges of 40 Hz-4 MHz and 178-408 K,respectively.The equivalent circuit model（RGQG）(RGBQGB) resolves the impedance response into two contributions originating from the intra-grain and inter-granular micro-constituents of the material.The electrical conduction mechanism is based on the Mott variable range hopping model.The complex electric modulus studies demonstrate the short-and long-range mobility of the charge carriers and rule out the presence of electrode effects on the dielectric relaxation mechanism of the material.The decreasing pattern of dielectric permittivity with frequency is explained by the Maxwell-Wagner type of polarization.The frequency dependence of the loss factor exhibits the presence of thermally activated relaxation time distribution in the material.

关键词： Auto-combustion Dielectric Electrical transport Electro-ceramic Impedance Perovskite

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Recent Progress,Challenges,and Prospects in Two‑Dimensional Photo‑Catalyst Materials and Environmental Remediation

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Nano-Micro Letters 2020年第12期12卷 29-105页

作者： Karim khan ayesha khan tareen Muhammad Aslam Rizwan Ur Rehman Sagar Bin Zhang Weichun Huang Asif Mahmood Nasir Mahmood Kishwar khan Han Zhang Zhongyi Guo School of Electrical Engineering and Intelligentization Dongguan University of Technology(DGUT)Dongguan 523808GuangdongPeople’s Republic of China Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Government Degree College Paharpur Gomel UniversityDera Ismail KhanK.P.KIslamic Republic of Pakistan School of Materials Science and Engineering Jiangxi University of Science and TechnologyJiangxi 341000People’s Republic of China School of Chemical and Bio‑Molecular Engineering The University of SydneySydneyNSW 2006Australia School of Engineering The Royal Melbourne Institute of Technology(RMIT)UniversityMelbourneVICAustralia Research Laboratory of Electronics(RLE) Massachusetts Institute of Technology(MIT)CambridgeMAUSA

The successful photo-catalyst library gives significant information on feature that affects photo-catalytic performance and proposes new materials.Competency is considerably significant to form multi-functional photo-catalysts with flexible characteristics.Since recently,two-dimensional materials(2DMs)gained much attention from researchers,due to their unique thickness-dependent uses,mainly for photo-catalytic,outstanding chemical and physical properties.Photo-catalytic water splitting and hydrogen(H2)evolution by plentiful compounds as electron(e−)donors is estimated to participate in constructing clean method for solar H2-formation.Heterogeneous photocatalysis received much research attention caused by their applications to tackle numerous energy and environmental issues.This broad review explains progress regarding 2DMs,significance in structure,and catalytic results.We will discuss in detail current progresses of approaches for adjusting 2DMs-based photo-catalysts to assess their photo-activity including doping,hetero-structure scheme,and functional formation assembly.Suggested plans,e.g.,doping and sensitization of semiconducting 2DMs,increasing electrical conductance,improving catalytic active sites,strengthening interface coupling in semiconductors(SCs)2DMs,forming nano-structures,building multi-junction nano-composites,increasing photo-stability of SCs,and using combined results of adapted approaches,are summed up.Hence,to further improve 2DMs photo-catalyst properties,hetero-structure design-based 2DMs’photo-catalyst basic mechanism is also reviewed.

关键词： Two-dimensional materials Photo-catalysts H2O2/H2-production Pollutant degradation CO2 reduction

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Two-Dimensional Tellurium:Progress,Challenges,and Prospects

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Nano-Micro Letters 2020年第8期12卷 82-115页

作者： Zhe Shi Rui Cao Karim khan ayesha khan tareen Xiaosong Liu Weiyuan Liang Ye Zhang Chunyang Ma Zhinan Guo Xiaoling Luo Han Zhang Institute of Microscale Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060GuangdongPeople’s Republic of China Department of Ophthalmology Shenzhen People’s HospitalSecond Clinical Medical College of Jinan UniversityFirst Affiliated Hospital of Southern University of Science and TechnologyShenzhen 518020GuangdongPeople’s Republic of China School of Electrical Engineering and Intelligentization Dongguan University of TechnologyDongguan 523808GuangdongPeople’s Republic of China

Since the successful fabrication of two-dimensional(2D)tellurium(Te)in 2017,its fascinating properties including a thickness dependence bandgap,environmental stability,piezoelectric effect,high carrier mobility,and photoresponse among others show great potential for various applications.These include photodetectors,field-effect transistors,piezoelectric devices,modulators,and energy harvesting devices.However,as a new member of the 2D material family,much less known is about 2D Te compared to other 2D materials.Motivated by this lack of knowledge,we review the recent progress of research into 2D Te nanoflakes.Firstly,we introduce the background and motivation of this review.Then,the crystal structures and synthesis methods are presented,followed by an introduction to their physical properties and applications.Finally,the challenges and further development directions are summarized.We believe that milestone investigations of 2D Te nanoflakes will emerge soon,which will bring about great industrial revelations in 2D materials-based nanodevice commercialization.

关键词： 2D materials Tellurium Photodetectors Solar cells Energy harvesting Logic gate and circuits

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Intelligent Load Shedding Using TCP/IP for Smart Grids

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Energy and Power Engineering 2012年第6期4卷 398-403页

作者： Muhammad Qamar Raza Muhammad Ali Nauman tareen Waheed ur Rehman Asadullah khan Azam Ul Asar Department of Electrical Engineering COMSATS Institute of Information Technology Abbottabad Pakistan

Computerized power management system with fast and optimal communication network overcomes all major discrepancies of undue or inadequate load relief that were present in old conventional systems. This paper presents the basic perception and methodology of modern and true intelligent load shedding scheme in micro grids topology by employing TCP/IP protocol for fast and intelligent switching. The network understudy performs load management and power distribution intelligently in a unified network. Generated power is efficiently distributed among local loads through fast communication system of server in the form of source and clients in the form of loads through TCP/IP. The efficient use of information between server and clients enables to astutely control the load shedding in a power system of micro grids system. The processing time of above stated system comes out to be 10 ms faster than others which ensure very less delay as compared to conventional methods. The Micro Grids system operating through TCP/IP control has been implemented in MATLAB/SIMULINK and results have been verified.

关键词： Intelligent Load Shedding (ILS) TCP/IP Micro Grids (MGs) Server and Clients

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UP-Gradation of Power System Protection Scheme through TCP/IP Using GUI

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Energy and Power Engineering 2012年第6期4卷 392-397页

作者： Muhammad Qamar Raza Muhammad Ali Asadullah khan Waheed ur Rehman Nauman tareen Azzam Ul Asar Department of Electrical Engineering COMSATS Institute of Information Technology Abbottabad Pakistan

The paper is concerned with the Power System Protection schemes and the resulting design requirement that enhances stability as well as control with the implementation of TCP/IP. It discusses the architecture that upgrades the existing scheme by controlling all the control signals traffic between generating units, transmission system, connected loads and protection devices that are sensitive to control signals using TCP/IP and results are compared using Graphics User Interface (GUI) in MATLAB/Simulink. Protection system describes latest breakers circuit using indirect tripping command from generating units that protects load side through load breakers that receives action signal from local controllers that have a direct communication linkage with main server having strong data base, directly monitors everything through TCP/IP platform using GUI.

关键词： Power System Protection Scenario (PSPS) TCP/IP Graphical User Interface (GUI)

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