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Room-temperature synthesis of high-efficiency and high-stability near-infrared FAPbI3 quantum dots passivated with zwitterionic short-chain amino acid ligands

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Journal of Luminescence 2025年 284卷

作者： Liao, Wan Hsuan Tseng, Yu Ting Chu, Sheng-Yuan Program on Integrated Circuit Design Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan Taiwan Department of Electrical Engineering National Cheng Kung University Tainan70101 Taiwan Department of Electrical Engineering National Cheng Kung University Tainan Taiwan Center for Micro/Nano Science and Technology National Cheng Kung University Tainan701 Taiwan

In the contemporary era of rapid technological advancement, light-emitting diode (LED) technology has become indispensable in many fields, including lighting, display, and communication. Nevertheless, developing efficient light sources in the near-infrared (NIR) region presents a significant challenge. Perovskite materials have garnered considerable interest in this spectral range due to their exemplary optical properties. An efficient perovskite near-infrared light source was synthesized at room temperature by utilizing the small molecule amino acid D-4-tert-butylphenylalanine (D4TBP). This resulted in successfully synthesizing a highly stable D4TBP-FAPbI3 near-infrared perovskite quantum dot. The photoluminescence quantum yield (PLQY) increased from 40 % to 68 %, and the film's contact angle improved from 65.36° to 93.87°, significantly enhancing its environmental stability. © 2025

关键词： Luminescent devices

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Beam induced lateral epitaxy of GaAs on a GaAs/Si template

Beam induced lateral epitaxy of GaAs on a GaAs/Si template

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Progress in Compound Semiconductor Materials IV - Electronic and Optoelectronic Applications

作者： Naritsuka, Shigeya Saitoh, Koji Kondo, Toshiyuki Maruyama, Takahiro Meijo University Dept. of Materials Science and Engineering Nagoya 468-8502 Japan Meijo University 21st century COE program NANO FACTORY

Beam induced lateral epitaxy (BILE) on truncated ridges was applied to the heteroepitaxial growth of GaAs on a Si substrate. A GaAs buffer layer was formed on the Si substrate, and then this GaAs/Si template was used as a substrate for the BILE process. As a result, overgrown regions of GaAs of widths as large as 6.5 μm were grown laterally from the sides of the truncated ridges. The growth regions had a flat, smooth top surface consisting of a (111) facet. Although stacking faults from the GaAs/Si template remained in the growth region, which are unfavorable for device applications, the lateral grown region has no dislocations. Thus, the BILE method is useful for reducing dislocations in heteroepitaxy. © 2005 Materials Research Society.

关键词： Semiconducting gallium arsenide

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Terahertz phonon polariton concentrator based on perovskite oxides

Terahertz phonon polariton concentrator based on perovskite ...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Xu, Rui Lin, Tong Luo, Jiaming Chen, Xiaotong Blackert, Elizabeth R. Moon, Alyssa R. JeBailey, Khalil M. Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States Program Rice University Houston United States

ISBN: (纸本)9781957171258

We report the experimental demonstration of surface phonon-polaritonic devices in a broad spectral range of 7-13 THz based on SrTiO3. We designed planar ultrafast concentrators that amplifies transient electric field by 6 times and measured an average field of 0.5 GV/m in an optically resolvable area in the far field. © 2023 The Author(s)

关键词： Perovskite

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Algorithm for finding the moving direction of a vehicle using magnetic sensor

Algorithm for finding the moving direction of a vehicle usin...

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IEEE Symposium on Computational Intelligence in Control and Automation

作者： Lee, Bong-Gu Kim, Jung-Han Department of Nano and IT Fusion Program Seoul National University of Science and Technology Seoul Korea Republic of Department of Mechanical Design and Automation Engineering Seoul National University of Science and Technology Seoul Korea Republic of

ISBN: (纸本)9781424499038

To improve the efficiency of the intelligent transportation system, the study on the detection of speed and moving direction of a vehicle has been researched recently. Conventional method to detect the moving direction of a vehicle is to use two separate sensor units under vehicle road, which results in expensive cost and long installation time. In this research, a novel method of detecting the moving direction of a vehicle using only one sensor unit is proposed. The newest magnetic sensor is multi-axis detectable and occupies very small space. The proposed detection scheme uses a 2-axis magnetic sensor, low cost microcontroller, and signal processing technique. The designed sensor for detection of the direction of a vehicle is easy to install and less expensive than other type sensor. Experimental results showed that the proposed algorithm sensor was very effective and reliable. © 2011 IEEE.

关键词： Magnetic sensors

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Influence of conformational change of chain unit on the intrinsic negative thermal expansion of polymers

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Chinese Chemical Letters 2021年第4期32卷 1515-1518页

作者： Qiangsheng Sun Ke Jin Yuhui Huang Jia Guo Thanyada Rungrotmongkol Phornphimon Maitarad Changchun Wang State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan UniversityShanghai 200433.China Biocatalyst and Environmental Biotechnology Research Unit Department of BiochemistryFaculty of Science and Program in Bioinformatics and Computational BiologyGraduate SchoolChulalongkom UniversityBangkok 10330Thailand Research Center of Nano Science and Technology Shanghai UniversityShanghai 200444China

Negative thermal expansion(NTE) behavior has roused wide interest for the control of thermomechanical properties of functional *** NTE behaviors have been found in kinds of compounds,it remains challenging for polymers to achieve intrinsic NTE *** this work,we systematically studied the conformational change of dibenzocyclooctadiene(DBCOD) derivatives between chair(C) and twist-boat(TB) forms based on density-functional theo ry(DFT) calculations,and found clear evidence of the relationship between the structure of DBCOD units and the thermal contraction behavior of the related *** order to obtain the polymer with NTE property,two conditions should be met for the thermal contracting DBCOD related units as follows:(i) the TB conformation can turn into C conformation as the temperature increases,and(ii) the volume of C conformation is smaller than that of TB *** rule should offer a guidance to exploration of the new intrinsic NTE polymers in the future.

关键词： Negative thermal expansion Conformational change Polyarylamides Density-functional theory Dibenzocyclooctadiene

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Dynamic inductive tuning of fano-resonant meta-surfaces using plasmonic response of graphene in mid-infrared

Dynamic inductive tuning of fano-resonant meta-surfaces usin...

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CLEO: QELS_Fundamental science, CLEO:QELS FS 2013

作者： Dabidian, N. Mousavi, S.H. Kholmanov, I. Alici, K. Purtseladze, D. Arju, N. Tatar, K. Suk, W. Hao, Y. Khanikaev, A.B. Ruoff, R.S. Shvets, G. Department of Physics Center for Nano and Molecular Science and Technology University of Texas at Austin TX United States Department of Mechanical Engineering and Materials and Science Program University of Texas at Austin Austin TX United States

We demonstrate theoretically and experimentally that electrically gated single-layer graphene can be used to inductively tune the infrared optical response of Fano-resonant metasurfaces. The induced spectral shifts ar... 详细信息

ISBN: (纸本)9781557529725

关键词： Graphene

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Reversible tuning of the electronic properties of graphene via controlled exposure to electron beam irradiation and annealing

Reversible tuning of the electronic properties of graphene v...

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2011 MRS Spring Meeting

作者： Teweldebrhan, Desalegne Liu, Guanxiong Balandin, Alexander A. Nano-Device Laboratory Bourne College of Engineering University of California - Riverside Riverside CA 92521 United States Material Science and Engineering Program University of California - Riverside Riverside CA 92521 United States

ISBN: (纸本)9781605113210

Graphene reveals many extraordinary properties including extremely high room temperature carrier mobility and intrinsic thermal conductivity. Understanding how to controllably modify graphene's properties is essential for its proposed applications. Here we report on a method for tuning the electrical properties of graphene via electron beam irradiation. It was observed that single-layer graphene is highly susceptible to the low-energy electron beams. We demonstrated that by controlling the irradiation dose one can change, by desired amount, the carrier mobility, shift the charge neutrality point, increase the resistance at the minimum conduction point, induce the "transport gap" and achieve current saturation in graphene. The change in graphene properties is due to defect formation on the graphene surface and in the graphene lattice. The changes are reversible by annealing until some critical irradiation dose is reached. © 2011 Materials Research Society.

关键词： Graphene

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An optical technique for the large-scale graphene recognition and quality control

An optical technique for the large-scale graphene recognitio...

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Frontiers in Optics, FiO 2010

作者： Nolen, Craig M. Teweldebrhan, Desalegne Denina, Giovanni Bhanu, Bir Balandin, Alexander A. Nano-Device Laboratory Department of Electrical Engineering and Materials Science and Engineering Program Bourns College of Engineering University of California-Riverside Riverside CA 92521 United States Visualization and Intelligent Systems Laboratory Department of Electrical Engineering and Materials Science and Engineering Program Bourns College of Engineering University of California-Riverside Riverside CA 92521 United States

We describe a fast and efficient method for recognition and quality control of the largearea graphene layers based on image processing algorithms. Results show that our technique is accurate and has potential for indu... 详细信息

关键词： Quality control

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Aggregation-induced emission and biological application of tetraphenylethene luminogens

Aggregation-induced emission and biological application of t...

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作者： Hong, Yuning Lam, Jacky Wing Yip Chen, Sijie Tang, Ben Zhong Department of Chemistry Nano Science and Technology Program Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Department of Polymer Science and Engineering Institute of Biomedical Macromolecules Zhejiang University Hangzhou 310027 China

Tetraphenylethene derivatives [Ph(PhCH=CHPhR)C=C(PhCH=CHPhR)Ph, R=H, CN, NO2, NPh2] with green, yellow-green, and orange emission colours were designed and synthesized. These molecules are practically non-emissive in their dilute solutions but emit intensely as nanoaggregates in poor solvents, demonstrating a novel phenomenon of aggregation-induced emission. Their blended films with poly(methyl methacrylate) also display bright emissions. Restriction of intramolecular motion in the condensed phase may be responsible for such unusual behaviour. Multilayer electroluminescence devices with a configuration of indium tin oxide/N,N′-di(1-naphthyl)-N,N′- diphenylbenzidine/emitter/tris(8-hydroxyquinolinolato)aluminum (Alq 3)/LiF/Al were constructed, which gave green light with a maximum luminance and current efficiency of 12930 cdcm-2 and 3.04cd A -1 respectively. The tetraphenylethenes can serve as excellent cell staining agents for selectively illuminating the cytoplasm and vesicles of living cells. © 2011 CSIRO.

关键词： Cytology

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Novel diamond shuttle to deliver flexible neural probe with reduced tissue compression

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Microsystems & nanoengineering 2020年第1期6卷 903-915页

作者： Kyounghwan Na Zachariah J.Sperry Jiaao Lu Mihaly Voroslakos Saman S.Parizi Tim M.Bruns Euisik Yoon John P.Seymour Electrical Engineering&Computer Science Department University of MichiganAnn ArborMI 48105USA Biomedical Engineering Department University of MichiganAnn ArborMI 48105USA Biointerfaces Institute University of MichiganAnn ArborMI 48105USA The Neuroscience Institute New York UniversityNew YorkNY 10016USA Center for Nanomedicine Institute for Basic Science(IBS)Seoul 03722Korea Graduate Program of Nano Biomedical Engineering(Nano BME) Yonsei-IBS InstituteYonsei UniversitySeoul 03722Korea Vivian L Smith Department of Neurosurgery University of Texas Health Science CenterHoustonTX 77030USA Department of Electrical and Computer Engineering Rice UniversityHoustonTX 77005USA

The ability to deliver flexible biosensors through the toughest membranes of the central and peripheral nervous system is an important challenge in neuroscience and neural *** devices implanted through dura mater and thick epineurium would ideally create minimal compression and acute damage as they reach the neurons of *** demonstrate that a three-dimensional diamond shuttle can be easily made with a vertical support to deliver ultra-compliant polymer microelectrodes(4.5-µm thick)through dura mater and thick *** diamond shuttle has 54%less cross-sectional area than an equivalently stiff silicon shuttle,which we simulated will result in a 37%reduction in blood vessel *** also discovered that higher frequency oscillation of the shuttle(200Hz)significantly reduced tissue compression regardless of the insertion speed,while slow speeds also independently reduced tissue *** and recording performance are demonstrated in rat and feline models,but the large design space of these tools are suitable for research in a variety of animal models and nervous system targets.

关键词： sectional neural thick

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