東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁 到查詢結果 [ null ]

切換: 標籤 | MARC模式 | ISBD

Applications of Scanning Tunneling M...

Heiner, Benjamin Ray,

FindBook

Google Book

Amazon

博客來

Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties // Benjamin Ray Heiner.
作者:	Heiner, Benjamin Ray,
面頁冊數:	1 electronic resource (144 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
Contained By:	Dissertations Abstracts International86-12B.
標題:	Physical chemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31931131
ISBN:	9798280711518

Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties /
Heiner, Benjamin Ray,

Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties /Benjamin Ray Heiner. - 1 electronic resource (144 pages)

Source: Dissertations Abstracts International, Volume: 86-12, Section: B.

Low-temperature scanning tunneling microscopy (STM) is used to investigate the self-assembly behavior of small molecules and amino acids on metal surfaces at ultra-high vacuum conditions. These experiments are used to study the role in intermolecular interactions and surface effects in the process of a system assembling into different crystal polymorphs. Non-equilibrium systems are prepared and studied to gain access to information about local energy minima across a potential energy surface alongside the configuration that represents the global energy minimum. These experiments are supported by computational methods such as classical force fields (Amber), density functional theory, and VASP. Electrospray ionization mass spectrometry data was also used to investigate solution clustering before molecules crystallized on the surface.Studying S-indoline-2-carboxylic acid and S-proline assemblies found metastable pentamer structures on the surface that apparently formed a racimic mixture of pinwheel structures on the surface despite being formed of enantiopure samples. After a variety of computational methods were used, it was concluded that these were two different polymorphs forming on the surface.Previous studies of FcCOOH on Au(111) revealed the formation of a quasicrystalline monolayer. To evaluate whether the absence of molecule-surface interactions in the model was reasonable, we performed the same experiment on Ag(111). We found that quasicrystals were not observed, Instead, we identified four monolayer structures distinct from any observed on any surface. VASP calculations are used to support our molecular assignments, and ESI-MS experiments show the potential origin of the dimer-based structures observed on the surface.Further work is presented using scanning tunneling spectroscopy (STS), an application of STM. The paucity of experimental data surrounding actinide research, and plutonium specifically, would be well addressed with characterization of the electronic structure of plutonium-containing compounds by STS. A study is presented here on room-temperature STS scans of the plutonium native oxide, which is commonly calculated as being a semiconductor. The results here show that the surface does not have a band gap, instead showing a dip in the density of states that never creates a break between the valence and the conduction band, similar to a semimetal.Additionally, preliminary work is presented on the electronic structure of the plutonium intermetallic PuCoGa5, which is the first plutonium-containing superconductor. Features in the initial experiments match with previous photoemission spectra, and the superconducting gap is observed. A region of inverse differential resistance is observed, and images of what may be the first ever atomic-resolution STM images of plutonium are reported.The STM work may shed light on the early stages of crystallization and the driving forces behind self-assembly and polymorphism. The STS work filled a significant need within the actinide community for reliable experimental electronic structure data of rare materials.LA-UR-25-21873.

English

ISBN: 9798280711518Subjects--Topical Terms:

1981412
Physical chemistry.
Subjects--Index Terms:

Crystal polymorphism

Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties /
LDR:04687nmm a22004573i 4500 001 2435172
005 20251001062505.5
006 m o d
007 cr|nu||||||||
008 261011s2025 miu||||||m |||||||eng d
020 $a 9798280711518
035 $a (MiAaPQD)AAI31931131
035 $a AAI31931131
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Heiner, Benjamin Ray, $e author. $0 (orcid)0000-0002-2677-5184 $3 3825385
245 1 0 $a Applications of Scanning Tunneling Microscopy for the Study of Atomic, Molecular, and Surface Properties / $c Benjamin Ray Heiner.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2025
300 $a 1 electronic resource (144 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
500 $a Advisors: Kandel, S. Alex Committee members: Lieberman, Marya; Corcelli, Steven A.
502 $b Ph.D. $c University of Notre Dame $d 2025.
520 $a Low-temperature scanning tunneling microscopy (STM) is used to investigate the self-assembly behavior of small molecules and amino acids on metal surfaces at ultra-high vacuum conditions. These experiments are used to study the role in intermolecular interactions and surface effects in the process of a system assembling into different crystal polymorphs. Non-equilibrium systems are prepared and studied to gain access to information about local energy minima across a potential energy surface alongside the configuration that represents the global energy minimum. These experiments are supported by computational methods such as classical force fields (Amber), density functional theory, and VASP. Electrospray ionization mass spectrometry data was also used to investigate solution clustering before molecules crystallized on the surface.Studying S-indoline-2-carboxylic acid and S-proline assemblies found metastable pentamer structures on the surface that apparently formed a racimic mixture of pinwheel structures on the surface despite being formed of enantiopure samples. After a variety of computational methods were used, it was concluded that these were two different polymorphs forming on the surface.Previous studies of FcCOOH on Au(111) revealed the formation of a quasicrystalline monolayer. To evaluate whether the absence of molecule-surface interactions in the model was reasonable, we performed the same experiment on Ag(111). We found that quasicrystals were not observed, Instead, we identified four monolayer structures distinct from any observed on any surface. VASP calculations are used to support our molecular assignments, and ESI-MS experiments show the potential origin of the dimer-based structures observed on the surface.Further work is presented using scanning tunneling spectroscopy (STS), an application of STM. The paucity of experimental data surrounding actinide research, and plutonium specifically, would be well addressed with characterization of the electronic structure of plutonium-containing compounds by STS. A study is presented here on room-temperature STS scans of the plutonium native oxide, which is commonly calculated as being a semiconductor. The results here show that the surface does not have a band gap, instead showing a dip in the density of states that never creates a break between the valence and the conduction band, similar to a semimetal.Additionally, preliminary work is presented on the electronic structure of the plutonium intermetallic PuCoGa5, which is the first plutonium-containing superconductor. Features in the initial experiments match with previous photoemission spectra, and the superconducting gap is observed. A region of inverse differential resistance is observed, and images of what may be the first ever atomic-resolution STM images of plutonium are reported.The STM work may shed light on the early stages of crystallization and the driving forces behind self-assembly and polymorphism. The STS work filled a significant need within the actinide community for reliable experimental electronic structure data of rare materials.LA-UR-25-21873.
546 $a English
590 $a School code: 0165
650 4 $a Physical chemistry. $3 1981412
650 4 $a Nuclear physics. $3 517741
650 4 $a Molecular chemistry. $3 1071612
650 4 $a Analytical chemistry. $3 3168300
653 $a Crystal polymorphism
653 $a Electronic structure
653 $a Scanning tunneling microscopy
653 $a Scanning tunneling spectroscopy
653 $a Self-assembly
653 $a Surface interaction
690 $a 0494
690 $a 0756
690 $a 0431
690 $a 0486
710 2 $a University of Notre Dame. $b Chemistry and Biochemistry. $e degree granting institution. $3 3770479
720 1 $a Kandel, S. Alex $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-12B.
790 $a 0165
791 $a Ph.D.
792 $a 2025
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31931131