An International Peer Reviewed Research Journal

AJP Vol 30 No 2, 2021

AJP

SSN : 0971 - 3093

Vol 30, No 2, February, 2021


Asian


Journal of Physics

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Volume 30                                                               No 2                                                              February 2021

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Anita Publications
FF-43, 1st Floor, Mangal Bazar, Laxmi Nagar, Delhi-110 092, India

Asian Journal of Physics                                                                                                       Vol. 30 No 2, 2021, 00-00


Vibrational dynamics via multidimensional electronic spectroscopy


Tobias Brixner

Institut für Physikalische und Theoretische Chemie, Universität Würzburg,

Am Hubland, 97074 Würzburg, Germany,

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Vibrational spectroscopy is commonly performed using infrared radiation for direct transitions between vibrational states or using visible radiation in a Raman process. As an alternative to narrowband lasers, broadband femtosecond pulses can be employed to excite vibrational wave packets whose temporal oscillations contain analogous information. In this review article, it is shown that coherent multidimensional electronic spectroscopy provides a generalization of this idea, such that vibrational information can be retrieved together with ultrafast dynamics and correlations between various electronically excited states. In particular, fluorescence-detected coherent two- and three-dimensional electronic spectroscopy is discussed. This can be realized in a single-beam geometry with shot-to-shot pulse shaping that allows for fast data acquisition and simultaneous measurement of 15 (or more) different four- and six-wave-mixing spectra. These provide information on higher electronically excited states, vibrational dynamics, and exciton transport, for example in supramolecular systems. Generalizations of this idea offer additional spatial resolution on a µm length scale in an optical microscope or even down to the few nm length scale using photoemission electron microscopy. Furthermore, the concept of signal detection was transferred to molecular beams and photoions. A topic of current interest is retrieving the full nonlinear tensor via polarization-shaped laser pulses. In general, multidimensional spectroscopy is a powerful strategy to systematically map out the response of a quantum system for increasing orders of nonlinearity in light–matter interaction. © Anita Publications. All rights reserved.

Keywords: Vibrational spectroscopy, Raman process, Photoions, Multidimensional spectroscopy  

Total Refs: 119

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Asian Journal of Physics                                                                                                           Vol. 30 No 2, 2021, 00-00


Immuno-SERS microscopy: From SERS nanotag design and correlative single-particle 

spectroscopy to protein localization on single cells and tissue


Michelle Hechler, Supriya Srivastav and Sebastian Schlücker*
Department of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE),
University Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany

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This review summarizes work from the authors’ laboratory on immuno-surface-enhanced Raman scattering (iSERS) microscopy since the demonstration of its proof of concept in 2006. iSERS microscopy is an emerging bioimaging technique for the selective localization of proteins on single cells and tissue. Selectivity for target proteins is achieved by labeling the corresponding antibodies with SERS labels/nanotags, i.e., molecularly functionalized noble metal nanoparticles for spectral identification. Central advantages of iSERS are multiplexing, quantification, minimization of autofluorescence, no/minimal photobleaching and the need for only a single laser excitation wavelength. The performance of SERS labels/nanotags can be studied in correlative single-particle SERS microspectroscopic and electron microscopic experiments. The rational design of optimal SERS labels/nanotags can be supported by computer simulations predicting the optical properties including the SERS signal enhancement. Work on iSERS from the authors’ group over the past 15 years on the selective localization of target proteins, especially in cancer diagnostics, on tissue and single cells is highlighted. © Anita Publications. All rights reserved.

Keywords: iSERS microscopy, SERS labels/nanotags, (iSECARS), Bioimaging technique.

Total Refs : 60

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Asian Journal of Physics                                                                                                                            Vol. 30 No 2, 2021, i-iii

Book Review
C V Raman and the Press: Scientific Reporting and Image Building  

(Part III: The Raman Research Institute Period)
Author: Dr. Rajinder Singh, University of Oldenburg, Germany.
Publishers: Shaker Publisher, Dueren, Germany,
Year of Publication 2020,
Pages XIV + 119 .
Price, Digital: 5,47 Euro, Paperback: 21,90 Euro.
ISBN: -- 978-3-8440-7520-5.
    The present book is the third and the last part of the trilogy entitled “C V Raman and the Press: Science Reporting and Image Building.” It chronicled Raman’s last phase of service career at the Raman Research Institute (RRI), Bangalore during 1948-1970. The first and the second parts of  the sequel profiled his life in Calcutta (1917-1933) and Bangalore(1933-1948).
book_review_C V Raman and the Press: Scientific Reporting and Image Building.pdf
Dr Anjana Chattopadhyay

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