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Effect of the orientation of non-spherical metal nanoparticle with respect to light polarization on its transient optical response

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Nanotechnology and Precision Engineering 2023年第2期6卷 41-47页

作者： Asha Singh himanshu srivastava Rama Chari J.Jayabalan Nano Science Laboratory Materials Science SectionRaja Ramanna Centre for Advanced TechnologyIndore 452013India Lithography and Microscopy Laboratory Synchrotrons Utilization SectionRaja Ramanna Centre for Advanced TechnologyIndore 452013India

Nanoparticles with non-spherical shapes are now being widely used for various photonic *** observe experimentally that the magnitude as well as the time dependence of the transient absorption of a colloid of silver nanoplatelets depends on the relative polarization of the pump and probe *** have been a few reports about the dependence of the transient signal magnitude on polarization,but little information is available on its temporal *** a theoretical model,we show that this observed behavior arises from the fact that the energy absorption by a non-spherical nanoparticle depends on,among other factors,the nanoparticle orientation with respect to the pump and probe polarization *** is essential to consider this when estimating nanoparticle characteristics such as carrier thermalization time,carrier–phonon scattering time,and complex polarizability from transient absorption measurements.

关键词： Ultrafast dynamics Metal Nanoparticles Transient Absorption Polarization dependence

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Analysis of Genetic Diversity among Wild and Cultivated Chickpea Genotypes Employing ISSR and RAPD Markers

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American Journal of Plant Sciences 2014年第5期5卷 676-682页

作者： Pramod Kumar Singh himanshu Sharma Nidhi srivastava Sameer S. Bhagyawant Department of Biotechnology Banasthali Univer-sity Banasthali India Institute of Himalayan Bioresource Technology Palampur Palampur India School of Studies in Biotechnology Jiwaji Univer-sity Gwalior India

Chickpea (Cicer airetinum L.) is an important and most preferred food legume in many parts of the world especially in the Indian sub-continent. Molecular analysis of chickpea using DNA technology has been carried out to identify the diverse genetic base of the cultivars for selected preferential introductions as efficient edible elements. A few of these genetic stocks have been documented here to tap their genetic diversity. The status shows that the level of polymorphism in this species is low. Using PCR based markers, marker assisted selection of polymorphy is one of the established techniques. Here, this procedure has been employed to expedite gene/QTL pyramiding in the chickpea. The study presented here includes analysis of 12 germplasms of chickpea. Standard CTAB method has been performed, with certain modifications, to get better intensity and resolution of DNA bands. Extracted DNA, amplified with 41 RAPD and 21 ISSR primers are thereby tested to determine genetic diversity. The presentation discusses the results of chickpea germplasm diversity on the basis of these observations.

关键词： Chickpea Randomly Amplified Polymorphic DNA and Inter Simple Sequence Repeats Genetic Diversity

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