scholarly journals Designing π-stacked molecular structures to control heat transport through molecular junctions

2014 ◽  
Vol 105 (23) ◽  
pp. 233102 ◽  
Author(s):  
Gediminas Kiršanskas ◽  
Qian Li ◽  
Karsten Flensberg ◽  
Gemma C. Solomon ◽  
Martin Leijnse
Keyword(s):  
Heat Transport ◽  
Molecular Structures ◽  
Molecular Junctions

Quantum bath effects on nonequilibrium heat transport in model molecular junctions

2021 ◽  
Vol 154 (9) ◽  
pp. 094108
Author(s):  
Pablo Carpio-Martínez ◽  
Gabriel Hanna
Keyword(s):  
Heat Transport ◽  
Molecular Junctions

scholarly journals Classical heat transport in anharmonic molecular junctions: Exact solutions

2013 ◽  
Vol 87 (2) ◽  
Author(s):  
Sha Liu ◽  
Bijay Kumar Agarwalla ◽  
Jian-Sheng Wang ◽  
Baowen Li
Keyword(s):  
Exact Solutions ◽  
Heat Transport ◽  
Molecular Junctions

scholarly journals Vibrational Heat Transport in Molecular Junctions

2016 ◽  
Vol 67 (1) ◽  
pp. 185-209 ◽  
Author(s):  
Dvira Segal ◽  
Bijay Kumar Agarwalla
Keyword(s):  
Heat Transport ◽  
Molecular Junctions

Electron Microscopy in Molecular Biology

1967 ◽  
Vol 25 ◽  
pp. 2-3
Author(s):  
Cecil E. Hall
Keyword(s):  
Electron Microscopy ◽  
Molecular Biology ◽  
Noise Level ◽  
Molecular Structures ◽  
Material Structure ◽  
The Arts ◽  
Shadow Casting ◽  
Electron Image ◽  
High Degree ◽  
Very High

The visualization of organic macromolecules such as proteins, nucleic acids, viruses and virus components has reached its high degree of effectiveness owing to refinements and reliability of instruments and to the invention of methods for enhancing the structure of these materials within the electron image. The latter techniques have been most important because what can be seen depends upon the molecular and atomic character of the object as modified which is rarely evident in the pristine material. Structure may thus be displayed by the arts of positive and negative staining, shadow casting, replication and other techniques. Enhancement of contrast, which delineates bounds of isolated macromolecules has been effected progressively over the years as illustrated in Figs. 1, 2, 3 and 4 by these methods. We now look to the future wondering what other visions are waiting to be seen. The instrument designers will need to exact from the arts of fabrication the performance that theory has prescribed as well as methods for phase and interference contrast with explorations of the potentialities of very high and very low voltages. Chemistry must play an increasingly important part in future progress by providing specific stain molecules of high visibility, substrates of vanishing “noise” level and means for preservation of molecular structures that usually exist in a solvated condition.

Scanning tunneling microscopy (STM) of DNA and RNA

1989 ◽  
Vol 47 ◽  
pp. 34-35
Author(s):  
Patricia G. Arscott ◽  
Gil Lee ◽  
Victor A. Bloomfield ◽  
D. Fennell Evans
Keyword(s):  
Molecular Structures ◽  
Inorganic Materials ◽  
Resolving Power ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Form And Function ◽  
Dna And Rna ◽  
Calf Thymus ◽  
And Function ◽  
The Relationship

STM is one of the most promising techniques available for visualizing the fine details of biomolecular structure. It has been used to map the surface topography of inorganic materials in atomic dimensions, and thus has the resolving power not only to determine the conformation of small molecules but to distinguish site-specific features within a molecule. That level of detail is of critical importance in understanding the relationship between form and function in biological systems. The size, shape, and accessibility of molecular structures can be determined much more accurately by STM than by electron microscopy since no staining, shadowing or labeling with heavy metals is required, and there is no exposure to damaging radiation by electrons. Crystallography and most other physical techniques do not give information about individual molecules.We have obtained striking images of DNA and RNA, using calf thymus DNA and two synthetic polynucleotides, poly(dG-me5dC)·poly(dG-me5dC) and poly(rA)·poly(rU).

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