Light Emission as a Probe of Energy Losses in Molecular Junctions

2016 ◽  
Vol 138 (3) ◽  
pp. 722-725 ◽  
Author(s):  
Oleksii Ivashenko ◽  
Adam Johan Bergren ◽  
Richard L. McCreery
Keyword(s):  
Light Emission ◽  
Molecular Junctions ◽  
Energy Losses

scholarly journals Spontaneous Light Emission from Molecular Junctions: Theoretical Analysis of Upconversion Signal

2019 ◽  
Vol 123 (49) ◽  
pp. 10594-10598 ◽  
Author(s):  
Hari Kumar Yadalam ◽  
Souvik Mitra ◽  
Upendra Harbola
Keyword(s):  
Theoretical Analysis ◽  
Light Emission ◽  
Molecular Junctions

scholarly journals Light emission and finite-frequency shot noise in molecular junctions: From tunneling to contact

2013 ◽  
Vol 88 (4) ◽  
Author(s):  
Jing-Tao Lü ◽  
Rasmus Bjerregaard Christensen ◽  
Mads Brandbyge
Keyword(s):  
Shot Noise ◽  
Light Emission ◽  
Molecular Junctions ◽  
Finite Frequency

scholarly journals Frequency-domain stimulated and spontaneous light emission signals at molecular junctions

2014 ◽  
Vol 141 (7) ◽  
pp. 074107 ◽  
Author(s):  
Upendra Harbola ◽  
Bijay Kumar Agarwalla ◽  
Shaul Mukamel
Keyword(s):  
Frequency Domain ◽  
Light Emission ◽  
Molecular Junctions

Monitoring of Energy Conservation and Losses in Molecular Junctions through Characterization of Light Emission

2016 ◽  
Vol 2 (12) ◽  
pp. 1600351 ◽  
Author(s):  
Oleksii Ivashenko ◽  
Adam Johan Bergren ◽  
Richard L. McCreery
Keyword(s):  
Energy Conservation ◽  
Light Emission ◽  
Molecular Junctions

scholarly journals Robust Bipolar Light Emission and Charge Transport in Symmetric Molecular Junctions

2017 ◽  
Vol 139 (22) ◽  
pp. 7436-7439 ◽  
Author(s):  
Ushula M. Tefashe ◽  
Quyen Van Nguyen ◽  
Frederic Lafolet ◽  
Jean-Christophe Lacroix ◽  
Richard L. McCreery
Keyword(s):  
Charge Transport ◽  
Light Emission ◽  
Molecular Junctions

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

New Aspects in the Design of Electron Optical Magnification Systems

1972 ◽  
Vol 30 ◽  
pp. 606-607
Author(s):  
Willem H.J. Andersen
Keyword(s):  
Electron Microscope ◽  
Imaging System ◽  
Chromatic Aberration ◽  
Research Tool ◽  
Energy Losses ◽  
Objective Lens ◽  
Theoretical Limit ◽  
Optical Magnification ◽  
Chromatic Aberrations ◽  
High Degree

Electron microscope design, and particularly the design of the imaging system, has reached a high degree of perfection. Present objective lenses perform up to their theoretical limit, while the whole imaging system, consisting of three or four lenses, provides very wide ranges of magnification and diffraction camera length with virtually no distortion of the image. Evolution of the electron microscope in to a routine research tool in which objects of steadily increasing thickness are investigated, has made it necessary for the designer to pay special attention to the chromatic aberrations of the magnification system (as distinct from the chromatic aberration of the objective lens). These chromatic aberrations cause edge un-sharpness of the image due to electrons which have suffered energy losses in the object.There exist two kinds of chromatic aberration of the magnification system; the chromatic change of magnification, characterized by the coefficient Cm, and the chromatic change of rotation given by Cp.

Scanning luminescence x-ray microscopy: Progress toward selective staining using microspheres

1994 ◽  
Vol 52 ◽  
pp. 74-75
Author(s):  
C. Jacobsen ◽  
J. Fu ◽  
S. Mayer ◽  
Y. Wang ◽  
S. Williams
Keyword(s):  
Visible Light ◽  
Active Sites ◽  
Light Emission ◽  
Chinese Hamster ◽  
Polystyrene Spheres ◽  
Good Resistance ◽  
X Ray ◽  
Selective Staining ◽  
Visible Light Emission ◽  
Specific Labelling

In scanning luminescence x-ray microscopy (SLXM), a high resolution x-ray probe is used to excite visible light emission (see Figs. 1 and 2). The technique has been developed with a goal of localizing dye-tagged biochemically active sites and structures at 50 nm resolution in thick, hydrated biological specimens. Following our initial efforts, Moronne et al. have begun to develop probes based on biotinylated terbium; we report here our progress towards using microspheres for tagging.Our initial experiments with microspheres were based on commercially-available carboxyl latex spheres which emitted ~ 5 visible light photons per x-ray absorbed, and which showed good resistance to bleaching under x-ray irradiation. Other work (such as that by Guo et al.) has shown that such spheres can be used for a variety of specific labelling applications. Our first efforts have been aimed at labelling ƒ actin in Chinese hamster ovarian (CHO) cells. By using a detergent/fixative protocol to load spheres into cells with permeabilized membranes and preserved morphology, we have succeeded in using commercial dye-loaded, spreptavidin-coated 0.03μm polystyrene spheres linked to biotin phalloidon to label f actin (see Fig. 3).

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