Results 81 to 90 of about 132,397 (310)

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Effect of impurities on the Raman scattering of 6H-SiC crystals

Materials Research, 2012
Raman spectroscopy was applied to different-impurities-doped 6H-SiC crystals. It had been found that the first-order Raman spectra of N-, Al- and B-doped 6H-SiC were shifted to higher frequency when comparing with undoped samples.
Shenghuang Lin, Zhiming Chen, Lianbi Li, Chen Yang   +3 more
doaj  

Characterization of cobalt ferrite nanoparticles obtained by various synthesis methods and comparison with the Raman spectra of other ferrites and some cubic oxide spinels [PDF]

Science of Sintering
Single phase cobalt ferrite (CoFe2O4) with nanoparticles of similar sizes (15.7-19 nm) was obtained by different synthesis methods: coprecipitation, ultrasonically assisted coprecipitation, coprecipitation followed by mechanochemical treatment ...
Lazarević Zorica Ž., Milutinović Aleksandra, Anđelković Ljubica, Petrović Milica, Hadžić Branka, Romčević Maja, Trajić Jelena, Romčević Nebojša Ž.   +7 more
doaj   +1 more source

Label-free haemogram using wavelength modulated Raman spectroscopy for identifying immune-cell subset

, 2014
The authors thank the UK EPSRC the CR-UK/EPSRC/MRC/DoH (England) imaging Program and the European Union project FAMOS (FP7 ICT, contract no. 317744) for funding, K.D. is a Royal Society-Wolfson Merit Award Holder.Leucocytes in the blood of mammals form a
Bavishna B. Praveen, Powis, S.J., Campbell, E.C., Ashok, P.C., Praveen, B.B., Simon J. Powis, Dholakia, K., Praveen C. Ashok, Elaine C. Campbell, Kishan Dholakia   +9 more
core   +1 more source

Graded‐Interface Dual‐Environment Hydrogel‐Polymer Electrolyte for Stabilized Anode and Sustained Cathode Kinetics in Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
A graded‐interface hydrogel‐polymer electrolyte decouples water activity to simultaneously stabilize the Zn anode and sustain cathode kinetics. The flexible design supports dendrite‐free cycling over 1600 h, high capacity in both MnO2 and V2O5 full cells, and stable pouch‐cell performance under bending, resolving the fundamental water conflict in ...
Shuyun Wang, Shengmei Chen, Xinyu Wang, Haipeng Wang, Jinsong Zhou, Ka Kiu Keith Cheung, Yiran Ying, Longtao Ma, Juan Antonio Zapien   +8 more
wiley   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Advancing living Bacillus spore identification: Multi-head self-attention mechanism-enabled deep learning combined with single-cell Raman spectroscopy

Journal of Innovative Optical Health Sciences
Many spore-forming Bacillus species can cause serious human diseases, because of accidental Bacillus spore infection. Thus, developing an identification strategy with both high sensitivity and specificity is greatly in demand. In this work, we proposed a
Mengjiao Xue, Fusheng Du, Lin He, Junhui Hu, Yuanpeng Li, Yuan Lu, Shuwen Zeng, Yufeng Yuan   +7 more
doaj   +1 more source

Long‐Range Coordination Environment Modulates Single‐Atom Local States and Systemic Impact on CO2 Photoconversion

Advanced Functional Materials, EarlyView.
Terminal groups on Cu porphyrins modulate the electronic states of single‐atom Cu centers through a long‐range electronic effect, without altering the Cu coordination geometry. Meanwhile, a multi‐descriptor framework is established that incorporates porphyrin regulation, hybrid catalyst properties, and CO2 photoreduction capabilities.
Yi Zhang, Jintao Dong, Xiahe Chen, Xiyang Wang, Tiange Wei, Yue Zhu, Tai‐Sing Wu, Yun‐Fang Yang, Shao‐Yuan Leu, Keke Wang, Yuanbin She, Huaming Li, Jiexiang Xia, Molly Meng‐Jung Li   +13 more
wiley   +1 more source

Comparative Study on Handheld, Modular, and Laboratory Raman Instruments for the Analysis of Colon Tissues and Colorectal Polyps

Applied Sciences
Portable Raman spectrometers may offer advantages for clinical medical diagnostics over laboratory instruments by allowing for quick measurements in the field and provision of data suitable for screening analyses.
Alla Synytsya, Zuzana Kováčová, Daniela Janstová, Michal Vočka, Jaromír Petrtýl, Luboš Petruželka   +5 more
doaj   +1 more source

A Fast Fluorescence Background Suppression Method for Raman Spectroscopy Based on Stepwise Spectral Reconstruction

IEEE Access, 2018
Raman spectroscopy is a rapid and non-destructive technique for detecting unique spectral fingerprints from biological samples. Raw Raman spectra often come with strong fluorescence background that makes spectral interpretation challenging.
Shuo Chen, Lingmin Kong, Wenbin Xu, Xiaoyu Cui, Quan Liu   +4 more
doaj   +1 more source