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Adsorption and Desorption of Chiral Molecules on Gold Substrate in Magnetic Fields

Qian, Shangyu (2020) Adsorption and Desorption of Chiral Molecules on Gold Substrate in Magnetic Fields. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

The chiral-induced spin selectivity (CISS) effect refers to the fact that when electrons transit through a chiral molecule (or structure), the chiral potential leads to an effective magnetic field in the rest frame of the electron that acts on the electron spin, providing a preference for the transmission of one electron spin orientation over the other. Because of the CISS effect, the interaction between a magnetized surface and a chiral molecule will depend on the enantiomer and on the magnetization direction of the magnetized substrate. This work aims to better understand the interaction between a ferromagnetic surface and chiral molecules and use the knowledge to establish a method of enantiomer separation. An electrochemical quartz crystal microbalance (EQCM) is used to study the electrochemical adsorption and desorption for different enantiomers of a chiral molecule, cysteine, onto ferromagnetic substrates under an external magnetic field, both thermodynamically and kinetically. The results show that the kinetics for adsorption and desorption of a chiral molecule depends on the magnetization direction of the surface.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Qian, Shangyushq11@pitt.edushq11
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWaldeck, David Hdave@pitt.edu
Committee MemberAmemiya, Shigeruamemiya@pitt.edu
Committee MemberWeber, Steve Gsweber@pitt.edu
Date: 8 June 2020
Date Type: Publication
Defense Date: 8 April 2020
Approval Date: 8 June 2020
Submission Date: 9 April 2020
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 57
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: CISS, EQCM, Magnetization, Enantiomer separation, Cysteine
Date Deposited: 08 Jun 2020 15:27
Last Modified: 08 Jun 2020 15:27
URI: http://d-scholarship.pitt.edu/id/eprint/38637

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