Role of metal-nanostructure features on tip-enhanced photoluminescence of single molecules

2021 ◽  
Author(s):  
Marco Romanelli ◽  
Giulia Dall'Osto ◽  
Stefano Corni
Keyword(s):  
Single Molecules ◽  
Enhanced Photoluminescence ◽  
Metal Nanostructure

Formation of Oriented Nanostructures from Single Molecules of Conjugated Polymers in Microdroplets of Solution:  The Role of Solvent

2004 ◽  
Vol 37 (16) ◽  
pp. 6132-6140 ◽  
Author(s):  
Pradeep Kumar ◽  
Adosh Mehta ◽  
Shannon M. Mahurin ◽  
Sheng Dai ◽  
Mark D. Dadmun ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Single Molecules ◽  
Role Of Solvent

scholarly journals Appearance of efficient luminescence energy transfer in doped orthovanadate nanocrystals

2017 ◽  
Vol 50 (3) ◽  
pp. 787-794 ◽  
Author(s):  
Swati Bishnoi ◽  
G. Swati ◽  
Paramjeet Singh ◽  
V. V. Jaiswal ◽  
Mukesh K. Sahu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Band Gap ◽  
Photoluminescence Intensity ◽  
X Ray Diffraction ◽  
Synthesis Mechanism ◽  
Enhanced Photoluminescence ◽  
Nir Absorption ◽  
Decay Parameters

This paper reports the detailed synthesis mechanism and the structural, morphological and optical characterization of ultraviolet (∼311 nm) excitable samarium doped gadolinium yttrium orthovanadate, (Gd,Y)VO4:Sm3+, nanocrystals. X-ray diffraction and Rietveld refinement studies confirmed that the synthesized samples crystallize in a tetragonal structure withI41/amdspace group. The enhanced photoluminescence intensity of (Gd,Y)VO4:Sm3+compared with the existing YVO4:Sm3+phosphor clearly indicates the significant role of Gd3+ions. This has been attributed to the sensitization of the6PJenergy level of Gd3+ions by energy transfer from orthovanadate (VO43−) ions and subsequent energy trapping by Sm3+ions. The energy transfer from VO43−to Sm3+viaGd3+ions as intermediates and concentration quenching of Gd3+luminescence are discussed in detail. The optical band gap of the as-prepared nanocrystals has been estimated using UV–vis–NIR absorption spectroscopy, which reveals a slightly higher band gap (3.75 eV) for YVO4as compared to GdYVO4(3.50 eV). Furthermore, confocal microcopy, decay parameters and Commission Internationale de l'Eclairage chromatic coordinates have supplemented these studies, which established the suitability of these nanophosphors for achieving spectral conversion in silicon solar cells.

Role of Kinks in Dyeing Crystals: Confocal Luminescence Microscopy from Single Molecules to Square Centimeters

2009 ◽  
Vol 9 (2) ◽  
pp. 982-990 ◽  
Author(s):  
Theresa Bullard ◽  
Kristin L. Wustholz ◽  
Eric D. Bott ◽  
Miranda Robertson ◽  
Philip J. Reid ◽  
...  
Keyword(s):  
Single Molecules ◽  
Luminescence Microscopy

Incorporating single molecules into electrical circuits. The role of the chemical anchoring group

2015 ◽  
Vol 44 (4) ◽  
pp. 920-942 ◽  
Author(s):  
Edmund Leary ◽  
Andrea La Rosa ◽  
M. Teresa González ◽  
Gabino Rubio-Bollinger ◽  
Nicolás Agraït ◽  
...  
Keyword(s):  
Significant Role ◽  
Single Molecules ◽  
Electronic Circuits ◽  
Electrical Circuits ◽  
Electrical Device ◽  
Anchoring Group ◽  
Anchoring Groups

Constructing electronic circuits containing singly wired molecules is at the frontier of electrical device miniaturisation. Understanding the behaviour of different anchoring groups is key to this goal because of their significant role in determining the properties of the junction.

scholarly journals Role of π−d hybridization in a 300-K organic-magnetic interface: Metal-free phthalocyanine single molecules on a bcc Fe(001) whisker

2016 ◽  
Vol 94 (19) ◽  
Author(s):  
T. K. Yamada ◽  
Y. Yamagishi ◽  
S. Nakashima ◽  
Y. Kitaoka ◽  
K. Nakamura
Keyword(s):  
Single Molecules ◽  
Metal Free

Highly ordered smectic structures of disc–rod luminescent liquid crystals: the role of the tolane group

2021 ◽  
Vol 9 (10) ◽  
pp. 3555-3561
Author(s):  
Yurong Liu ◽  
Wei Li ◽  
Xuan Zhou ◽  
Wai-Yeung Wong ◽  
Zhen-Qiang Yu
Keyword(s):  
Liquid Crystals ◽  
Synergistic Effect ◽  
Smectic Phase ◽  
Enhanced Photoluminescence ◽  
First Time

The highly ordered smectic phase has been reported for the first time in two liquid crystals. They also exhibit enhanced photoluminescence, indicating the synergistic effect of the disc and rod moieties apart from the competition between them.

Non-classical effects in proton or hydrogen transfer

2016 ◽  
Vol 88 (10-11) ◽  
pp. 1063-1071 ◽  
Author(s):  
Jacek Waluk
Keyword(s):  
Hydrogen Transfer ◽  
Organic Molecules ◽  
Vibrational Excitation ◽  
Single Molecules ◽  
Electronic States ◽  
Condensed Phases ◽  
Vibrational Modes ◽  
Transfer Path ◽  
Multidimensional Process

AbstractResults of thorough investigations of tautomerism in the ground and excited electronic states performed for various organic molecules under different regimes: condensed phases, isolated and single molecules, with a special emphasis on porphycene, a porphyrin isomer, demonstrate that, in order to precisely describe the proton/hydrogen transfer path, one has to explicitly consider tunneling. Tautomerization is a multidimensional process, controlled by excitation of specific vibrational modes. Vibrational excitation can both enhance or hinder the reaction. The role of specific vibrational modes can now be assessed, even at the level of single molecules.

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