Results 101 to 110 of about 653,628 (283)

Toroidal circular dichroism

, 2016
We demonstrate that the induced toroidal dipole, represented by currents flowing on the surface of a torus, makes a distinct and indispensable contribution to circular dichroism.
Fedotov, V.A., Papasimakis, N., Chen, W.T., Youngs, I.J., Tsai, D.P., Zheludev, N.I., Raybould, T.A., Kuprov, I.   +7 more
core   +1 more source

Plaid‐Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe2

Advanced Science, EarlyView.
Helicity‐ and angle‐resolved Raman spectroscopy reveals chiral magnons in the non‐coplanar antiferromagnet MnTe 2. Combined with first‐principles calculations and spin‐wave theory, the results establish its altermagnetic character through circular Raman dichroism, reduced rotational symmetry, and a distinctive plaid‐like momentum‐space magnon spin ...
Dirk Wulferding, Daehyeon An, Jiwon Choi, Dongmin Moon, Youngsu Choi, Sivasakthi Kuppusamy, Sritharan Krishnamoorthi, Raman Sankar, Myung Joon Han, Se Kwon Kim, Kwang‐Yong Choi   +10 more
wiley   +1 more source

Chiroptical and Magneto‐Optical Properties of Chiral Copper Phthalocyanine‐Based Thin Films

ChemistryEurope
Chirality, once considered unrelated to magnetism, has recently been recognized to couple with magnetic fields through magneto‐chiral anisotropies (MChAs), such as magneto‐chiral dichroism (MChD).
Kazuyuki Ishii, Keishi Yamaguchi, Ryo Ishii, Kei Murata   +3 more
doaj   +1 more source

Investigation on the Recognition of Split Aflatoxin M1 Aptamer

Shipin gongye ke-ji
In this work, AFM1 was chosen as the target, and the aptamer was split to solve the low sensitivity due to unstable structure of the aptamer. The recognition ability and specificity of the split aptamer were evaluated using electrochemical methods, and ...
Yekun ZHENG, Congcong DU, Honglin LI, Ting GUO, Yuhao ZHANG, Liang MA   +5 more
doaj   +1 more source

Giant Circular Dichroism in Individual Carbon Nanotubes Induced by Extrinsic Chirality

Physical Review X, 2014
Circular dichroism is widely used for characterizing organic and biological materials, but measurements at a single-molecule level are challenging because differences in absorption for opposite helicities are small. Here, we show that extrinsic chirality
A. Yokoyama, M. Yoshida, A. Ishii, Y. K. Kato   +3 more
doaj   +1 more source

Indole alkaloid sulfonic acids from an aqueous extract of Isatis indigotica roots and their antiviral activity

Acta Pharmaceutica Sinica B, 2017
Six new indole alkaloid sulfonic acids (1–6), together with two analogues (7 and 8) that were previously reported as synthetic products, were isolated from an aqueous extract of the Isatis indigotica root.
Lingjie Meng, Qinglan Guo, Yufeng Liu, Minghua Chen, Yuhuan Li, Jiandong Jiang, Jiangong Shi   +6 more
doaj   +1 more source

Homochirality through Photon-Induced Melting of RNA/DNA: the Thermodynamic Dissipation Theory of the Origin of Life [PDF]

, 2010
The homochirality of the molecules of life has been a vexing problem with no generally accepted solution to date. Since a racemic mixture of chiral nucleotides frustrates the extension and replication of RNA and DNA, understanding the origin of ...
Karo Michaelian
core  

Optical Nanosensor Architecture for Cell-Signaling Molecules Using DNA Aptamer-Coated Carbon Nanotubes [PDF]

, 2011
We report a novel optical biosensor platform using near-infrared fluorescent single-walled carbon nanotubes (SWNTs) functionalized with target-recognizing aptamer DNA for noninvasively detecting cell-signaling molecules In real time.
Rickus, Jenna, Jong Hyun Choi, Choi, Jong Hyun, Sauffer, M. Dane, Benjamin A. Baker, Salgado, Janette, Jaroch, David, Janette Salgado, D. Marshall Porterfield, M. Dane Sauffer, David Jaroch, Jenna L. Rickus, Cha, Tae-Gon, Tae-Gon Cha, Baker, Benjamin A., Porterfield, D. Marshall   +15 more
core   +1 more source

Engineering Synergistic Intra‐/Intermolecular Conformational Locking via Side‐Chain Branching: A β‐Sheet‐Inspired Strategy for Planar NIR‐II Phototheranostic Aggregates

Advanced Science, EarlyView.
A bio‐inspired side‐chain branching strategy is developed to orchestrate a dual noncovalent conformational locking (NoCL) network, enabling the construction of perfectly planar NIR‐II phototheranostic aggregates. Such structural precision maximizes light‐harvesting efficiency and optimizes exciton dynamics, ensuring synchronized enhancements in NIR‐II ...
Cheng Lu, Qian Jia, Bo Wu, Chao Li, Ryan T. K. Kwok, Tie‐Gen Chen, Jianwei Sun, Zheng Zhao, Teng‐Teng Chen, Zhongliang Wang, Jacky W. Y. Lam, Ben Zhong Tang   +11 more
wiley   +1 more source

Functionalised DNA - introducing and applying a versatile porphyrin molecular ruler

, 2012
Porphyrin moieties were rigidly attached to DNA to generate an accurate molecular ruler. Molecular ruler analysis was conducted using steady-state fluorescence, circular dichroism and small angle X-ray scattering spectroscopic techniques, in an attempt ...
Burns, Jonathan
core   +1 more source