Publications by authors named "Guda Ramakrishna"

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Pyrene-Functionalized Fluorescent Nanojars: Synthesis, Mass Spectrometric, and Photophysical Studies.
Melanie M Mitchell, Vageesha W Liyana Gunawardana, Guda Ramakrishna, Gellert Mezei

ACS Omega· December 2021

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Beads on a Chain Fluorescent Oligomeric Materials: Interactions of Conjugated Organic Cross-Linkers with Silsesquioxane Cages.
Shahrea Mahbub, Sukanya Saha, Guda Ramakrishna, Joseph C Furgal

J Phys Chem B· October 2021

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Synthesis and Photophysical Properties of Light-Harvesting Gold Nanoclusters Fully Functionalized with Antenna Chromophores.
Kyunglim Pyo, Hongmei Xu, Sang Myeong Han, Shivi Saxena, Sook Young Yoon, Guda Ramakrishna

Small· July 2021

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The Missing Link: Au(SPh-Bu) Janus Nanoparticle with Molecular and Bulk-Metal-like Properties.
Naga Arjun Sakthivel, Masoud Shabaninezhad, Luca Sementa, Bokwon Yoon, Mauro Stener, Guda Ramakrishna

J Am Chem Soc· September 2020

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Intrinsically fluorescent gold nanoclusters stabilized within a copper storage protein that follow the Irving-Williams trend in metal ion sensing.
Dhanashree Selvan, Pallavi Prasad, Skyler Crane, Abubkr Abuhagr, Richard Covington, Guda Ramakrishna

Analyst· July 2019

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Theoretical investigation of size, shape, and aspect ratio effect on the LSPR sensitivity of hollow-gold nanoshells.
Masoud Shabaninezhad, Guda Ramakrishna

J Chem Phys· April 2019

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Unique Energy Transfer in Fluorescein-Conjugated Au Nanoclusters Leading to 160-Fold pH-Contrasting Photoluminescence.
Kyunglim Pyo, Nguyen Hoang Ly, Sang Myeong Han, Mohammad Bin Hatshan, Abubkr Abuhagr, Guda Ramakrishna

J Phys Chem Lett· September 2018

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Au(SR): The Smallest Gold Thiolate Nanocrystal That Is Metallic and the Birth of Plasmon.
Naga Arjun Sakthivel, Mauro Stener, Luca Sementa, Alessandro Fortunelli, Guda Ramakrishna

J Phys Chem Lett· March 2018

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Energy Gap Law for Exciton Dynamics in Gold Cluster Molecules.
Kyuju Kwak, Viraj Dhanushka Thanthirige, Kyunglim Pyo, Dongil Lee, Guda Ramakrishna

J Phys Chem Lett· October 2017

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AuS(SAdm): An Anisotropic Gold Nanomolecule. Optical and Photoluminescence Spectroscopy and First-Principles Theoretical Analysis.
Alessandro Fortunelli, Luca Sementa, Viraj Dhanushka Thanthirige, Tanya C Jones, Mauro Stener, Guda Ramakrishna

J Phys Chem Lett· January 2017

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Enhanced luminescence of Au(SG) nanoclusters via rational surface engineering.
Kyunglim Pyo, Viraj Dhanushka Thanthirige, Sook Young Yoon, Guda Ramakrishna, Dongil Lee

Nanoscale· December 2016

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Ultrabright Luminescence from Gold Nanoclusters: Rigidifying the Au(I)-Thiolate Shell.
Kyunglim Pyo, Viraj Dhanushka Thanthirige, Kyuju Kwak, Prabhu Pandurangan, Guda Ramakrishna

J Am Chem Soc· July 2015

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Two-photon absorption properties of chromophores in micelles: electrostatic interactions.
Semere Bairu, Guda Ramakrishna

J Phys Chem B· September 2013

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Excited-state structure of oligothiophene dendrimers: computational and experimental study.
Ekaterina Badaeva, Michael R Harpham, Ramakrishna Guda, Özgün Süzer, Chang-Qi Ma

J Phys Chem B· December 2010

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Single- and multiphoton turn-on fluorescent Fe(3+) sensors based on bis(rhodamine).
Aruna J Weerasinghe, Carla Schmiesing, Shankar Varaganti, Guda Ramakrishna, Ekkehard Sinn

J Phys Chem B· July 2010

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Optically excited acoustic vibrations in quantum-sized monolayer-protected gold clusters.
Oleg Varnavski, Guda Ramakrishna, Junhyung Kim, Dongil Lee, Theodore Goodson

ACS Nano· June 2010

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Ultrafast optical excitations in supramolecular metallacycles with charge transfer properties.
Daniel C Flynn, Guda Ramakrishna, Hai-Bo Yang, Brian H Northrop, Peter J Stang

J Am Chem Soc· February 2010

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Critical size for the observation of quantum confinement in optically excited gold clusters.
Oleg Varnavski, Guda Ramakrishna, Junhyung Kim, Dongil Lee, Theodore Goodson

J Am Chem Soc· January 2010

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Quantum-sized gold clusters as efficient two-photon absorbers.
Guda Ramakrishna, Oleg Varnavski, Junhyung Kim, Dongil Lee, Theodore Goodson

J Am Chem Soc· April 2008

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Oligothiophene dendrimers as new building blocks for optical applications.
Guda Ramakrishna, Ajit Bhaskar, Peter Bauerle, Theodore Goodson

J Phys Chem A· March 2008

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Giant thienylene-acetylene-ethylene macrocycles with large two-photon absorption cross section and semishape-persistence.
Michele Williams-Harry, Ajit Bhaskar, Guda Ramakrishna, Theodore Goodson, Mika Imamura

J Am Chem Soc· March 2008

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Excited-state deactivation of branched two-photon absorbing chromophores: a femtosecond transient absorption investigation.
Guda Ramakrishna, Theodore Goodson

J Phys Chem A· February 2007

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Interparticle electromagnetic coupling in assembled gold-necklace nanoparticles.
Guda Ramakrishna, Qiu Dai, Jianhua Zou, Qun Huo, Theodore Goodson

J Am Chem Soc· February 2007

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Enhancement of two-photon absorption cross-section in macrocyclic thiophenes with cavities in the nanometer regime.
Ajit Bhaskar, Guda Ramakrishna, Kevin Hagedorn, Oleg Varnavski, Elena Mena-Osteritz

J Phys Chem B· February 2007

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Building symmetric two-dimensional two-photon materials.
Ajit Bhaskar, Ramakrishna Guda, Michael M Haley, Theodore Goodson

J Am Chem Soc· November 2006

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