Results 111 to 120 of about 7,929 (304)

Observation of Raman Optical Activity by Heterodyne-Detected Polarization-Resolved Coherent Anti-Stokes Raman Scattering

, 2012
International audienceWe report the first observation of Raman optical activity (ROA) by coherent anti-Stokes Raman scattering. Thanks to the more freedom of polarization configurations in coherent anti-Stokes Raman scattering than in spontaneous Raman ...
Kano, Hideaki, Hiramatsu, Kotaro, Leproux, Philippe, Hamaguchi, Hiro-O, Couderc, Vincent, Okuno, Masanari   +5 more
core   +1 more source

Spike‐Embedded Nanocatalysts via Metal‐Directed Carbonization for Highly Efficient and Robust Semi‐Hydrogenation

Advanced Science, EarlyView.
A metal‐directed carbonization strategy transforms hierarchical organic microspheres into spiky carbon catalysts with Pd nanoparticles embedded at the tips. This approach resolves the activity‐stability trade‐off, achieving exceptional poison resistance in semi‐hydrogenations, offering a versatile, scalable platform for designing high‐performance ...
Yintao Li, Yang Sun, Minghang Li, Wenxuan Zhang, Zhengtao Li, Yihao Ni, Yao Zhang, Yong Wang, Samuel S. Veroneau, Pengfei Ji   +9 more
wiley   +1 more source

Coulomb attraction driven spontaneous molecule-hotspot pairing enables universal, fast, and large-scale uniform single-molecule Raman spectroscopy

Opto-Electronic Advances
Raman spectroscopy offers a great power to detect, analyze and identify molecules, and monitor their temporal dynamics and evolution when combined with single-molecule surface-enhanced Raman scattering (SM-SERS) substrates.
Lihong Hong, Haiyao Yang, Jianzhi Zhang, Zihan Gao, Zhi-Yuan Li   +4 more
doaj   +1 more source

Measurement of nonreciprocal spontaneous Raman scattering in Silicon photonic wires

Optics Express, 2010
We report on measurements that show the strength of the spontaneous Raman scattering in strongly confining silicon waveguides to depend significantly on the propagation direction of the amplified signal wave with respect to the pump wave. Furthermore, the strength of this nonreciprocity depends on the orientation of the waveguide with respect to the ...
Jost, Müller, Michael, Krause, Hagen, Renner, Ernst, Brinkmeyer   +3 more
openaire   +2 more sources

Local Polarization Unit Engineering Enables Ultrahigh Energy Density in NBT‐Based High‐Entropy Ceramic Capacitors

Advanced Science, EarlyView.
Herein, we demonstrate a breakthrough in dielectric energy storage by engineering local polarization units in high‐entropy multilayer ceramic capacitors (MLCCs). The optimized MLCCs achieve an ultrahigh recoverable energy density of 18.2 J cm−3 with 91% efficiency, coupled with exceptional thermal stability and fatigue resistance.
Shiyu Zhou, Yucheng Zhou, Linhai Li, A. Pelaiz‐Barranco, Xuefeng Chen, Genshui Wang, Yiwei Chen, Rongjiang Wang, Konstantin Nefedev, Tengfei Hu, Dawei Wang, Tongqing Yang   +11 more
wiley   +1 more source

Label-free visualization of lignin deposition in loquats using complementary stimulated and spontaneous Raman microscopy

Horticulture Research, 2019
The lignification triggered by biotic or abiotic stresses hardens fruits and vegetables and eventually influences their consumer appeal. Extensive prior efforts have been made to unveil the underlying mechanism of flesh lignification, primarily focused ...
Nan Zhu, Yifan Yang, Minbiao Ji, Di Wu, Kunsong Chen   +4 more
doaj   +1 more source

Imaging Electric Polarization Switching in Multilayer Graphene

Advanced Science, EarlyView.
Domain wall sliding‐induced electric polarization switching is directly observed for the first time in multilayer graphene, enabled by a novel optical readout method. The polarization switching is realized upon application of global and local electric fields, and mechanical forces between neighboring polar domains of opposite out‐of‐plane polarizations
Zhou Zhou, Xiyao Peng, Jianfeng Bi, Jing He, Fei Xue, Jie Jiang, Huizhen Wu, Zhiwen Shi, Haoliang Qian, Toshikaze Kariyado, Sihan Zhao   +10 more
wiley   +1 more source

Ligand‐Defined Interfacial Chemistry Enables Instant and Sequence‐General DNA Chemisorption on Gold Nanoparticles Toward Label‐Free SERS With Single‐Base Resolution

Advanced Science, EarlyView.
Ascorbic Acid‐Engineered Interface Enables Universal DNA Functionalization on Gold Nanoparticles: Attenuating electrostatic repulsion and leveraging synergistic hydrogen‐bonding interactions significantly lowers the kinetic barrier for DNA adsorption, enabling rapid and sequence‐general functionalization of non‐thiolated DNA‐requiring only a single ...
Guangping Li, Cheng Wang, Xinyue Wu, Zhongxiang Ding, Heng Gao, Zhonggang Liu, Yu Zhang, Jinai Chen, Feng Wang, Honglin Liu   +9 more
wiley   +1 more source

Multiferroic‐Centric Materials and Systems Engineering for Battery Applications: An Insight Into Mechanisms, Strategies, and Characterizations

Advanced Science, EarlyView.
Multiferroic order parameters – polarization, magnetization, and ferroelastic strain – are positioned as dynamic design variables for batteries. Their mechanistic roles, practical tuning through fabrication and external fields, and ferroic‐resolved characterization routes are unified into a closed‐loop framework, revealing how coupled ferroic responses
Jiaqi Su, Yanda Zhu, Hao Peng, Manman Li, Xuzihan Zhang, Meixiao Wu, Siyuan Zhang, Yuhan Zeng, Jiwen Liao, Ming Luo, Hetaishan Huang, Yutong Wang, Sean Li, Wenxian Li   +13 more
wiley   +1 more source

Sub-metre spatial resolution temperature compensated distributed strain sensor

We propose and demonstrate a scheme which utilizes the temperature dependence of spontaneous Raman scattering to provide temperature compensation for a sub-metre spatial resolution Brillouin frequency based strain sensor.
Newson, T.P., Belal, Mohammad
core