Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Investigation of Molecular Wires: Molecular Superconductors to Proteins

Khan, Sajida A.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1414756747

Abstract Details

2014, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
This dissertation work focused on the study of two types of molecular wires, the first one was an organic superconductor (BETS)2GaCl4 and the second one was a protein known as amyloid beta peptide (Aß (1-42)). Both type of molecules were studied using Ag(111) substrate. (BETS)2GaCl4 was deposited using standard STM deposition techniques. A new molecular arrangement different from the bulk was found. The superconducting gap was found to exist in this new type of molecular arrangement. The superconducting transition temperature was found to be 6.8 K. Smaller clusters were isolated from bigger molecular islands using lateral manipulation techniques. The superconducting effects on Ag(111) substrate were observed by comparing the changes in Ag(111) surface state for both superconducting and non-superconducting clusters (isolated clusters). The surface state was found to be quenched at the metal superconductor boundary, which was not the case for non-superconducting clusters. The mechanical properties of Aß (1-42) were also studied using lateral manipulation techniques. First the molecules were relocated on the Ag(111) substrate without breaking. The Aß (1-42) molecules were also rotated, twisted, and bent using STM lateral manipulation. Form acquired lateral manipulation signals the angle of force vectors during the manipulation processes were determined. Form the tip height and measured angles the numerical value of force was determined for lateral motion, rotation, twisting, and bending of individual peptides.
Saw. W Hla (Advisor)
101 p.
Condensed Matter Physics; Nanoscience; Nanotechnology; Physics
Molecular Superconductors; Molecular Wires; Amyloid beta Peptide; Bio-molecules; STM; Superconductors; Proximity Effect;

Recommended Citations

Citations

  • Khan, S. A. (2014). Investigation of Molecular Wires: Molecular Superconductors to Proteins [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1414756747

    APA Style (7th edition)

  • Khan, Sajida. Investigation of Molecular Wires: Molecular Superconductors to Proteins. 2014. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1414756747.

    MLA Style (8th edition)

  • Khan, Sajida. "Investigation of Molecular Wires: Molecular Superconductors to Proteins." Doctoral dissertation, Ohio University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1414756747

    Chicago Manual of Style (17th edition)

ohiou1414756747
359
© 2014, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.