Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)

Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)

Bibliographic Details
Main Author: Skeini, Timur
Language:English
Published: Ohio University / OhioLINK 2010
Subjects:
Physics
beta-carotene
&946
-carotene
chlorophyll-a
STM
scanning tunneling microscope
single molecule
cluster
lateral manipulation
nanotechnology
nano-device
biotechnology
mechanical stability
ultra high vacuum
low temperature
switching
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1273755921
id ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou1273755921
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou12737559212021-08-03T05:46:29Z Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene) Skeini, Timur Physics beta-carotene &946 -carotene chlorophyll-a STM scanning tunneling microscope single molecule cluster lateral manipulation nanotechnology nano-device biotechnology mechanical stability ultra high vacuum low temperature switching We mimic beta-carotene (β-carotene) environment in plant leaves by using Au(111) as a substrate and conduct single molecule level studies in ultra high vacuum at low substrate temperatures of 77 K and 4.2 K. The STM images and manipulations studies identify five mechanically stable beta-carotene conformations on this substrate, with two never before reported by experiments. We confirm beta-carotene single molecule switching and molecular wire functionality. The beta-carotene clusters are disordered and rich in conformations. Single molecule extraction and cluster manipulation experiments indicate that intermolecular interactions of beta-carotene on Au(111) are stronger than molecule-substrate interactions. The mixtures of beta-carotene and chlorophyll-a result in three regions of ordered self-assembled chlorophyll-a, mobile beta-carotene, and their disordered mixtures with a ratio of 43.6±7.8% to 56.4±10.1% (over 9 mixtures), respectively, with 56.0±10.1% of beta-carotene being trans, indicating beta-carotene preferential mixing with chlorophyll-a instead of its own beta-carotene clusters. The results of this dissertation provide information on single molecule level properties of beta-carotene for fundamental understanding as well as for applications in green nano-bio-technology, nano-medicine, molecular electronics, and energy harvesting. 2010-08-05 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1273755921 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1273755921 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Physics
beta-carotene
&946
-carotene
chlorophyll-a
STM
scanning tunneling microscope
single molecule
cluster
lateral manipulation
nanotechnology
nano-device
biotechnology
mechanical stability
ultra high vacuum
low temperature
switching
spellingShingle Physics
beta-carotene
&946
-carotene
chlorophyll-a
STM
scanning tunneling microscope
single molecule
cluster
lateral manipulation
nanotechnology
nano-device
biotechnology
mechanical stability
ultra high vacuum
low temperature
switching
Skeini, Timur
Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
author Skeini, Timur
author_facet Skeini, Timur
author_sort Skeini, Timur
title Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
title_short Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
title_full Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
title_fullStr Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
title_full_unstemmed Single Molecule Study of Beta-Carotene using Scanning Tunneling Microscope (Up-close and Personal Investigation of Beta-Carotene)
title_sort single molecule study of beta-carotene using scanning tunneling microscope (up-close and personal investigation of beta-carotene)
publisher Ohio University / OhioLINK
publishDate 2010
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1273755921
work_keys_str_mv AT skeinitimur singlemoleculestudyofbetacaroteneusingscanningtunnelingmicroscopeupcloseandpersonalinvestigationofbetacarotene
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