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Exploring Nanoscale Perovskite Materials for Next‑Generation Photodetectors:A Comprehensive Review and Future Directions

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Nano-Micro Letters 2025年第2期17卷 46-108页

作者： Xin Li Sikandar Aftab Maria Mukhtar Fahmid Kabir Muhammad Farooq Khan Hosameldin Helmy Hegazy Erdi Akman State Key Laboratory of Pulsed Power laser technology National University of Defense TechnologyHefei 230037AnhuiPeople’s Republic of China Anhui Laboratory of Advanced laser technology Hefei 230037AnhuiPeople’s Republic of China Nanhu laser Laboratory Changsha 410015HunanPeople’s Republic of China department of Semiconductor systems Engineering and Clean Energy Sejong UniversitySeoul 05006Republic of Korea department of Artificial Intelligence and Robotics Sejong UniversitySeoul 05006Republic of Korea School of Engineering Science Simon Fraser UniversityBurnabyBC V5A 1S6Canada department of Electrical Engineering Sejong UniversitySeoul 05006South Korea department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Central Labs King Khalid UniversityAlQura’aP.O.Box 96061413 AbhaSaudi Arabia Scientific and Technological Research and Application Center Karamanoglu Mehmetbey University70100 KaramanTurkey

The rapid advancement of nanotechnology has sparked much interest in applying nanoscale perovskite materials for photodetection *** materials are promising candidates for next-generation photodetectors(PDs)due to their unique optoelectronic properties and flexible synthesis *** review explores the approaches used in the development and use of optoelectronic devices made of different nanoscale perovskite architectures,including quantum dots,nanosheets,nanorods,nanowires,and *** a thorough analysis of recent literature,the review also addresses common issues like the mechanisms underlying the degradation of perovskite PDs and offers perspectives on potential solutions to improve stability and scalability that impede widespread *** addition,it highlights that photodetection encompasses the detection of light fields in dimensions other than light intensity and suggests potential avenues for future research to overcome these obstacles and fully realize the potential of nanoscale perovskite materials in state-of-the-art photodetection *** review provides a comprehensive overview of nanoscale perovskite PDs and guides future research efforts towards improved performance and wider applicability,making it a valuable resource for researchers.

关键词： Nanoscale perovskites Photodetectors Nanosheets Nanorods Nanowires Quantum dots Nanocrystals

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Medical images classification for skin cancer using quantitative image features with optical coherence tomography

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Journal of Innovative Optical Health Sciences 2016年第2期9卷 8-16页

作者： Wei Gao Valery P.Zakharov Oleg O.Myakinin Ivan A.Bratchenko Dmitry N.Artemyev Dmitry V.Kornilin department of laser and Biotechnical systems Samara State aerospace University

Optical coherence tomography(OCT)is employed in the diagnosis of skin ***,quantitative image features extracted from OCT images might be used as indicators to classify the skin *** the present paper,we investigated intensity-based,texture-based and fractalbased features for automatically classifying the melanomas,basal cell carcinomas and pigment *** estimating equations were used to test for differences between the skin tumors.A modified p value of<0.001 was considered statistically *** increase of mean and median of intensity and significant decrease of mean and median of absolute gradient were observed in basal cell carcinomas and pigment nevi as compared with *** decrease of contrast,entropy and fractal dimension was also observed in basal cell carcinomas and pigment nevi as compared with *** results suggest that the selected quantitative image features of OCT images could provide useful information to differentiate basal cell carcinomas and pigment nevi from the *** research is warranted to determine how this approach may be used to improve the classification of skin tumors.

关键词： Optical coherence tomography skin tumor texture analysis fractal analysis differentiate box counting

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Micro-impulse and plasma plume produced by irradiating aluminum target with nanosecond laser pulses in double-pulse scheme

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Plasma Science and technology 2022年第7期24卷 82-89页

作者： Chenghao YU Jifei YE Weijing ZHOU Hao CHANG Wei GUO State Key Laboratory of laser Propulsion&Application Department of Aerospace and TechnologySpace Engineering UniversityBeijing 101416People's Republic of China

The micro-impulse generated by ablating an aluminum target in double-pulse laser bursts with different interpulse delays was investigated using a torsion *** plasma plume was simultaneously visualized using high-speed photography to analyze the coupling mechanism of the ablation *** experiment was carried out using a pulsed laser with a pulse width of 8 ns and a wavelength of 1064 *** experimental results show that an impulse with an interpulse delay of 60 ns is roughly 60%higher than that with no delay between the two pulses,when the energy of both laser pulses is 50 m ***,double-pulse schemes could enhance the ablation impulse under certain *** is because the ablation of the first laser pulse changes the optical properties of the aluminum target surface,increasing the ***,the ablation impulse is reduced with a time delay of 20 ns when the energy of both laser pulses is100 mJ or 150 *** can be concluded that the plasma produced by ablating the aluminum with the first pulse shields the second laser *** summarize,the experimental results show that different delay times in a double-pulse scheme have a significant effect on the ablation *** study provides a reference for the optimization of the parameters when laser ablation propulsion with a double-pulse scheme is applied in the fields of space debris removal,laser ablation thrusters,and so on.

关键词： laser ablation double pulse scheme impulse enhancement aluminum plasma plume fast photography

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Effect of Pressure Level on the Performance of an Auto-Initiated Pulsed Plasma Thruster

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Plasma Science and technology 2010年第4期12卷 466-472页

作者： Kelvin LOH Abhijit KUSHARI department of aerospace Engineering Nanyang Technological University department of aerospace Engineering Indian Institute of Technology

Pulsed plasma thrusters （PPT） are micro-propulsion devices used in satellites for station keeping. Conventionally the plasma discharge in a PPT is initiated by a spark plug. The primary objective of the present work was to develop and characterize a PPT that does not need a spark plug to initiate the plasma discharge. If the spark plug is eliminated, the size of the thrusters can be reduced and arrays of such thrusters can be manufactured using micro electro mechanical systems （MEMS） techniques, which can provide tremendous control authority over the satellite positioning. A parallel rail thruster was built and its performances were characterized inside a vacuum chamber to elucidate the effect of vacuum level on the performance. The electrical performance of the thruster was quantified by measuring the voltage output from a Rogowski coil, and the thrust produced by the developed thruster was estimated by measuring the force exerted by the plume on a light weight pendulum, whose deflection was measured using a laser displacement sensor. It was observed that the thruster can operate without a spark plug. In general, the performance parameters such as thrust, mass ablation, impulse bit, and specific impulse per discharge, would increase with the increase in pressure up to an optimum level due to the increase in discharge energy as well as the decrease in the total impedance of the plasma discharge. The thrust efficiency is found to be affected by the discharge energy.

关键词： plasma thruster auto-initiation solid propellant micro-thruster

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AN APPROACH TOWARDS HOLISM IN SCIENCE AND ENGINEERING

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Journal of systems Science and systems Engineering 2010年第3期19卷 285-305页

作者： Jason SHERWIN department of aerospace Engineering Georgia Institute of Technology

This paper posits the desirability of a shift towards a holistic approach over reductionist approaches in the understanding of complex phenomena encountered in science and engineering. An argument based on set theory is used to analyze three examples that illustrate the shortcomings of the reductionist approach. Using these cases as motivational points, a holistic approach to understand complex phenomena is proposed, whereby the human brain acts as a template to do so. Recognizing the need to maintain the transparency of the analysis provided by reductionism, a promising computational approach is offered by which the brain is used as a template for understanding complex phenomena. Some of the details of implementing this approach are also addressed.

关键词： Reductionism holism agent-based modeling linearizations multi-disciplinary optimization complex phenomena understanding Markov-chain vector space hierarchical temporal memories neuroscience-influenced computing

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Modeling of disturbance torque in an aerostatic bearings-based nano-satellite simulator

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Journal of systems Engineering and Electronics 2018年第3期29卷 618-624页

作者： LIU Yanfang HUO Mingying QI Naiming department of aerospace Engineering Harbin Institute of Technology

The disturbance torque of aerostatic bearings is in the same order of the reaction wheel, which causes difficulty in evaluation of the designed attitude control strategy of a nano-satellite based on the aerostatic bearing. Two approaches are proposed to model the disturbance torque. Firstly, the gravity induced moment,the vortex torque, and the damping moment are modeled separately. However, the vortex torque and the damping moment are coupled with each other as both of them are caused by the viscosity. In the second approach, the coupling effect is considered. A nano-satellite is constructed based on aerostatic bearing. The time history of the free rotation rate from an initial speed is measured by the gyro, which is further used to calculate the rotation angle and acceleration. The static vortex torque is measured via the removable micro-torque measurement system. Based on these data, the model parameters are identified and modeling errors are presented. Results show that the second model is more *** root mean squire error is less than 0.5×10^（-4） N·m and the relative error of the static vortex torque is 0.16%.

关键词： aerostatic bearing disturbance torque vortex torque spacecraft simulator modeling and identification

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Modeling Method and Application of Rational Finite Element Based on Absolute Nodal Coordinate Formulation

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Acta Mechanica Solida Sinica 2018年第2期31卷 207-228页

作者： Chao Ma Cheng Wei Jing Sun Bin Liu Beijing Key Laboratory of Intelligent Space Robotic systems technology and Applications Beijing Institute of Spacecraft System Engineering department of aerospace Engineering Harbin Institute of Technology

In multibody system dynamics, the absolute nodal coordinate formulation （ANCF） uses power functions as interpolating polynomials to describe the displacement field. It can get accurate results for flexible bodies that undergo large deformation and large rotation. However, the power functions are irrational representation which cannot describe the complex shapes precisely, especially for circular and conic sections. Different from the ANCF representation, the rational absolute nodal coordinate formulation （RANCF） utilizes rational basis functions to describe geometric shapes, which allows the accurate representation of complicated displacement and deformation in dynamics modeling. In this paper, the relationships between the rational surface and volume and the RANCF finite element are provided, and the generalized transformation matrices are established correspondingly. Using these transformation matrices, a new four-node three-dimensional RANCF plate element and a new eight-node three-dimensional RANCF solid element are proposed based on the RANCF. Numerical examples are given to demonstrate the applicability of the proposed elements. It is shown that the proposed elements can depict the geometric characteristics and structure configurations precisely, and lead to better convergence in comparison with the ANCF finite elements for the dynamic analysis of flexible bodies.

关键词： Multibody system dynamics Absolute nodal coordinate formulation Flexible deformation Spline representation Rational finite element

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A novel solution treatment and aging for powder bed fusion-laser beam Ti-6Al-2Sn-4Zr-6Mo alloy:Microstructural and mechanical characterization

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 414-424页

作者： Gianluca Pirro Alessandra Martucci Alessandro Morri Mariangela Lombardi Lorella Ceschini department of Industrial Engineering(DIN) Alma Mater Studiorum-University of BolognaBologna 40136Italy department of Applied Science and technology(DISAT) Politecnico di TorinoTorino TO 10129Italy

Ti-6Al-4Zr-2Sn-6Mo alloy is one of the most recent titanium alloys processed using powder bed fusion-laser beam(PBF-LB)*** alloy has the potential to replace Ti-6Al-4V in automotive and aerospace applications,given its superior mechanical properties,which are approximately 10%higher in terms of ultimate tensile strength(UTS)and yield strength after appropriate heat *** as-built conditions,the alloy is characterized by the presence of soft orthorhombicα″martensite,necessitating a postprocessing heat treatment to decompose this phase and enhance the mechanical properties of the ***,PBFed Ti6246 components undergo an annealing process that transforms theα″martensite into anα-βlamellar *** primary objective of this research was to develop a solution treatment and aging(STA)heat treatment tailored to the unique microstructure produced by the additive manufacturing process to achieve an ultrafine bilamellar microstructure reinforced by precipitation *** study investigated the effects of various solution temperatures in theα-βfield(ranging from 800 to 875℃),cooling media(air and water),and aging time to determine the optimal heat treatment parameters for achieving the desired bilamellar *** each heat treatment condition,differentα-βmicrostructures were found,varying in terms of theα/βratio and the size of the primaryα-phase *** attention was given to how these factors were influenced by increases in solution temperature and how microhardness correlated with the percentage of the metastableβphase present after *** tests were performed on samples subjected to the most promising heat treatment parameters.A comparison with literature data revealed that the optimized STA treatment enhanced hardness and UTS by13%and 23%,respectively,compared with those of the annealed *** surface analyses were conducted to investigate fracture mechanisms.

关键词： powder bed fusion-laser beam titanium alloys heat treatments mechanical properties fractographic analysis

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Attitude Control of Rigid Body with Inertia Uncertainty and Saturation Input

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Tsinghua Science and technology 2017年第1期22卷 83-91页

作者： Xi Ma Fuchun Sun Hongbo Li Bing He department of Computer Science and technology Tsinghua UniversityState Key Lab of Intelligent Technology and Systemsand Tsinghua National Laboratory for Information Scienceand Technology (TNList) department of aerospace Engineering High-Tech Institute of Xi’an

In this paper, the attitude control problem of rigid body is addressed with considering inertia uncertainty,bounded time-varying disturbances, angular velocity-free measurement, and unknown non-symmetric saturation input. Using a mathematical transformation, the effects of bounded time-varying disturbances, uncertain inertia,and saturation input are combined as total disturbances. A novel finite-time observer is designed to estimate the unknown angular velocity and the total disturbances. For attitude control, an observer-based sliding-mode control protocol is proposed to force the system state convergence to the desired sliding-mode surface; the finite-time stability is guaranteed via Lyapunov theory analysis. Finally, a numerical simulation is presented to illustrate the effective performance of the proposed sliding-mode control protocol.

关键词： attitude control inertial uncertainty angular velocity-free measurement saturation input finite-time observer sliding-mode control

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Review of Infrared signature suppression systems using optical blocking method

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Defence technology（防务技术） 2019年第3期15卷 432-439页

作者： Nidhi Baranwal Shripad P. Mahulikar department of aerospace Engineering Indian Institute of Technology Bombay Mumbai 400076 India Institute aerospace Engineering

With rapid advancements in Infra-Red (IR) detection techniques, the range from where the IR-guided missiles are able to lock the target aircraft has increased. To avoid the detection and tracking by modern IR-guided missiles, the aircraft and helicopters also demand progress in its stealth techniques. Hence, study of Infra-Red Signature Suppression (IRSS) systems in aircraft and helicopters has become vital even in design stage. Optical blocking (masking) is one of the effective IRSS techniques used to block the Line- Of-Sight (LOS) of the hot engine parts of the exhaust geometry. This paper reviews the various patents on IR signature suppression systems based on the optical blocking method or a combination of IRSS techniques. The performance penalties generated due to installation of various IRSS methods in aircraft and helicopters are also discussed.

关键词： IR signature suppression Optical blocking Performance penalty IR signature level Engine back-pressure

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