Dynamics of Protonated Peptide Ion Collisions with Organic Surfaces: Consonance of Simulation and Experiment

2016 ◽  
Vol 7 (16) ◽  
pp. 3142-3150 ◽  
Author(s):  
Subha Pratihar ◽  
George L. Barnes ◽  
Julia Laskin ◽  
William L. Hase
Keyword(s):  
Protonated Peptide ◽  
Ion Collisions ◽  
Simulation And Experiment ◽  
Organic Surfaces

Chemical dynamics simulations of energy transfer, surface-induced dissociation, soft-landing, and reactive-landing in collisions of protonated peptide ions with organic surfaces

2016 ◽  
Vol 45 (13) ◽  
pp. 3595-3608 ◽  
Author(s):  
Subha Pratihar ◽  
George L. Barnes ◽  
William L. Hase
Keyword(s):  
Energy Transfer ◽  
Protonated Peptide ◽  
Chemical Dynamics ◽  
Peptide Ions ◽  
Soft Landing ◽  
Surface Induced Dissociation ◽  
Organic Surfaces ◽  
Dynamics Simulations ◽  
Reactive Landing

Different simulation approaches like MM, QM + MM, and QM/MM, were used to study surface-induced dissociation, soft-landing, and reactive-landing for the peptide-H+ + surface collisions.

Role of Projectile and Surface Temperatures in the Energy Transfer Dynamics of Protonated Peptide Ion Collisions with the Diamond {111} Surface†

2006 ◽  
Vol 110 (27) ◽  
pp. 8418-8422 ◽  
Author(s):  
Asif Rahaman ◽  
Othalene Collins ◽  
Chavell Scott ◽  
Jiangping Wang ◽  
William L. Hase
Keyword(s):  
Energy Transfer ◽  
Protonated Peptide ◽  
Ion Collisions ◽  
Surface Temperatures

STM of freeze-fracture replicas: Problems and promises

1993 ◽  
Vol 51 ◽  
pp. 68-69
Author(s):  
J. T. Woodward ◽  
J. A. N. Zasadzinski
Keyword(s):  
Scanning Tunneling Microscope ◽  
Organic Materials ◽  
Freeze Fracture ◽  
Atomic Resolution ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Molecular Scale ◽  
Organic Surfaces ◽  
Metal Layers ◽  
Conductive Surfaces

The Scanning Tunneling Microscope (STM) offers exciting new ways of imaging surfaces of biological or organic materials with resolution to the sub-molecular scale. Rigid, conductive surfaces can readily be imaged with the STM with atomic resolution. Unfortunately, organic surfaces are neither sufficiently conductive or rigid enough to be examined directly with the STM. At present, nonconductive surfaces can be examined in two ways: 1) Using the AFM, which measures the deflection of a weak spring as it is dragged across the surface, or 2) coating or replicating non-conductive surfaces with metal layers so as to make them conductive, then imaging with the STM. However, we have found that the conventional freeze-fracture technique, while extremely useful for imaging bulk organic materials with STM, must be modified considerably for optimal use in the STM.

GIANT RESONANCES IN HEAVY ION COLLISIONS

1984 ◽  
Vol 45 (C6) ◽  
pp. C6-269-C6-279
Author(s):  
A. Bonaccorso ◽  
M. Di Toro ◽  
U. Lombardo ◽  
G. Russo
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Giant Resonances ◽  
Ion Collisions

Exploring Baryon Rich Matter with Heavy-Ion Collisions

2019 ◽  
Vol 64 (7) ◽  
pp. 583 ◽  
Author(s):  
S. Harabasz
Keyword(s):  
Center Of Mass ◽  
Heavy Ion ◽  
State Density ◽  
Heavy Nuclei ◽  
First Order ◽  
Center Of Mass Energy ◽  
Ion Collisions ◽  
Deconfinement Phase Transition ◽  
Ground State Density

Collisions of heavy nuclei at (ultra-)relativistic energies provide a fascinating opportunity to re-create various forms of matter in the laboratory. For a short extent of time (10-22 s), matter under extreme conditions of temperature and density can exist. In dedicated experiments, one explores the microscopic structure of strongly interacting matter and its phase diagram. In heavy-ion reactions at SIS18 collision energies, matter is substantially compressed (2–3 times ground-state density), while moderate temperatures are reached (T < 70 MeV). The conditions closely resemble those that prevail, e.g., in neutron star mergers. Matter under such conditions is currently being studied at the High Acceptance DiElecton Spectrometer (HADES). Important topics of the research program are the mechanisms of strangeness production, the emissivity of matter, and the role of baryonic resonances herein. In this contribution, we will focus on the important experimental results obtained by HADES in Au+Au collisions at 2.4 GeV center-of-mass energy. We will also present perspectives for future experiments with HADES and CBM at SIS100, where higher beam energies and intensities will allow for the studies of the first-order deconfinement phase transition and its critical endpoint.

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