Results 61 to 70 of about 434 (197)

Green and Scalable Synthesis of Efficient and Stable CsPbBr3 Perovskite Quantum Dots Enables Low‐Threshold Amplified Spontaneous Emission

Advanced Science, EarlyView.
Green and scalable synthesis of CsPbBr3 perovskite quantum dots using bio‐sourced lecithin and hexane enables single‐batch production over 10 grams. Suppressed Auger recombination and electron‐phonon coupling yields 95% PLQY, enhanced stability, and low ASE thresholds of 230.4 (ns) and 50.1 (fs) µJ cm−2 in neat films. ABSTRACT Halide perovskite quantum
Yongfeng Liu, Mengting Zhang, Qingyu Xie, Kehao Hu, Bowen Zhang, Zhe Zhang, Jie Yang, Zhiping Hu, Juan Du, Jia Wang, Min Zhou   +10 more
wiley   +1 more source

Single‐Atom‐Enhanced Fully Inkjet‐Printed Electrochemical Sensor for Dopamine Detection

Advanced Science, EarlyView.
Fully inkjet‐printed paper‐based dopamine sensors are fabricated using nitrogen‐doped graphene acid functionalized with copper single atoms. The copper sites uniquely enhance dopamine oxidation through strong molecular adsorption, as verified by electrochemical measurements and DFT calculations. The approach highlights the potential of single‐atom inks
Martin‐Alex Nalepa, David Panáček, Vítězslav Hrubý, Matěj Jendrišák, Rostislav Langer, Michal Langer, Petr Jakubec, Ivan Dědek, Vojtěch Kupka, Michal Mazur, Radek Zbořil, Michal Otyepka   +11 more
wiley   +1 more source

Direct Solar Power‐Driven Durable Ammonia Electrosynthesis From Nitrate Under Fluctuating Voltage Conditions

Angewandte Chemie, EarlyView.
Isolated Sn sites on Cu(111) induce a highly asymmetric charge distribution, which promotes water dissociation, accelerates key intermediate hydrogenation, and suppresses competing hydrogen evolution. As a result, SnCu111 delivers NH3 Faradaic efficiencies above 90% over an 800 mV potential window and enables stable direct solar power‐driven NH3 ...
Xiaokang Wang, Jiankun Li, Liyun Wu, Sirui Tang, Chuangwei Liu, Jianping Yang, Qilong Wu, Xiangdong Yao, Jun Chen   +8 more
wiley   +2 more sources

ESTIMATION OF THE SURFACE TENSION OF Cu-2 AT. %Ge AND Cu-4 AT. %Mn SOLID SOLUTIONS, USING DATA OBTAINED BY AUGER ELECTRON SPECTROSCOPY [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013
In the regular solution approximation with the experimental values of the composition of the surface, obtained by Auger electron spectroscopy, calculated the temperature dependence of the surface tension of (111)Cu-2 at. %Ge and (100)Cu-4 at.
I.N. Sergeev, K.Ch. Bzhihatlov
doaj  

Development of the web-based NIST X-ray Photoelectron Spectroscopy (XPS) Database

Data Science Journal, 2006
The first Web-based version of the NIST X-ray Photoelectron Spectroscopy Database (XPSDB) is described. The current database, built from a relational database management system (RDBMS), contains critically evaluated data with over 19,000 line positions ...
Angela Y Lee, Dorothy M Blakeslee, Cedric J Powell, John R Rumble, Jr   +3 more
doaj   +1 more source

Metal Active‐Site Exposure via Ligand Engineering Boosts CO2‐to‐Ethylene Conversion on Cu18 Nanoclusters

Advanced Science, EarlyView.
Through quantitative ligand stripping of [Cu18H17(PR3)10]+ nanoclusters via intramolecular interaction modulation, selectivity for CO2 electroreduction to C2H4 is significantly enhanced. The weakly coordinating ligand triggers dual‐ligand stripping (FEC2H4 = 70.59%), whereas the strongly coordinating ligand results in single‐ligand retention (FEC2H4 ...
Ziqi Chen, Yang Zuo, Yu Zhu, Shuo Zhang, Along Ma, Shiyin Yang, Zhengmao Yin, Xiaoshuang Ma, Shuxin Wang   +8 more
wiley   +1 more source

Natural Sunlight IR‐Driven Highly Efficient Synthesis of Acetaldehyde From Bioethanol Over Cu/Fe2O3

Angewandte Chemie, EarlyView.
This work reports a Cu/Fe2O3 catalyst for the conversion of bioethanol into valuable acetaldehyde and green hydrogen under both infrared (IR) light and natural sunlight. This IR‐driven system sets a new performance benchmark, with TON and initial TOF enhanced by at least one order of magnitude, enabled by a constructed IR photon‐to‐phonon channel and ...
Xiyi Li, Jiangting Zhao, Junjun Guo, Ze‐Kai Yu, Enqi Chen, Qiong Liu, Tieou Wang, Asterios Gavriilidis, Xue‐Qing Gong, Yang Lan, Junwang Tang   +10 more
wiley   +2 more sources

Elucidating the Respective Roles of Photochemical and Photothermal Effects in Photocatalytic Methanol Decomposition

Nano-Micro Letters
Highlights A rationally engineered Cu-TiO2/Ti model catalyst enables the distinction of photochemical and photothermal effects, revealing their distinct roles in enhancing CH3OH dehydrogenation and suppressing HCHO overoxidation, thus achieving high H2 ...
Qichen Liu, Yida Zhang, Limin Liu, Zixiang Huang, Jiawei Zheng, Shiqin Jian, Haibin Pan, Chi Cao, Hongliang Li, Qing Yang, Yu Bai, Xusheng Zheng   +11 more
doaj   +1 more source

Auger Electron Spectroscopy-A Review

Asian Journal of Pharmaceutical Research and Development, 2019
Auger electron spectroscopy (AES) is surface sensitive analytical technique mainly,it provides quantitative elemental and chemical state information from surfaces of solid materials.It utilizes a high current, finely focused electron beam as an excitation source.In AES,A sample is probed with electron beam with energy between 3 to 3o Kev which results ...
R. Swethasri, M. Sreshta, K. Bhavyasri
openaire   +2 more sources

Engineering Slow‐Carrier Interfacial Recombination Enables Tailored Spectral Response

Advanced Science, EarlyView.
This work demonstrates that weak‐drift slow carriers are preferentially captured at generic semiconductor surfaces/interfaces and recombine. This process is manipulated to achieve tailored spectral response. A tens of µm‐wide depletion region is created to observe surface collection rates for photocarriers generated at different positions.
Yibo Zhang, Haozhe Wang, Zeke Liu, Yun Zhong, Zheng‐Hong Lu, Nazir P. Kherani   +5 more
wiley   +1 more source