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The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides./
Author:	Preciado, Edwin Sabas.
Description:	1 online resource (117 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Subject:	Materials science. -
Online resource:	click for full text (PQDT)
ISBN:	9781369833188

The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides.
Preciado, Edwin Sabas.

The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides. - 1 online resource (117 pages)

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--University of California, Riverside, 2017.

Includes bibliographical references

The acoustoelectric effect in single-layer molybdenum disulfide (MoS2) and tungsten diselenide (WSe2) is studied in a hybrid setup. Such effects, which rely on the transfer of momentum from surface acoustic waves (SAWs), are generated on the surface of lithium niobate (LiNbO3) to the carriers in MoS2 and WSe2, resulting in an attenuation and velocity shift of the wave and giving rise to an acoustoelectric current. This dissertation examines the feasibility of integrating high-quality, single-layer MoS2 and WSe2 onto LiNbO3 to ultimately fabricate and characterize a hybrid chip that combines the functionality of a field-effect transistor (FET) and SAW device. MoS2 and WSe2 were synthesized by chemical vapor deposition (CVD) directly onto a chemically-reduced LiNbO3 substrate. LiNbO3 is a ferroelectric material that offers a unique blend of piezoelectric and birefringent properties, yet it lacks both optical activity and semiconductor transport. The prototypical device exhibits electrical characteristics that are competitive with MoS2 and WSe2 devices on silicon. These results demonstrate both a sound-driven battery and an acoustic photodetector, and ultimately open directions to non-invasive investigation of electrical properties of single-layer films. The experiments reveal close agreement between transport measurements utilizing conventional contacts and SAW spectroscopy. This approach will set forth the possibility of contact-free transport characterization of two-dimensional (2D) transition metal dichalcogenides (TMD) films, avoiding such concerns as the role of charge transfer at contacts as an artifact of such measurements.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369833188Subjects--Topical Terms:

557839
Materials science.
Index Terms--Genre/Form:

554714
Electronic books.

The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides.
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245 1 4 $a The Acoustoelectric and Electric Characterization of Single Layer Transition Metal Dichalcogenides.
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500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
500 $a Adviser: Ludwig Bartels.
502 $a Thesis (Ph.D.)--University of California, Riverside, 2017.
504 $a Includes bibliographical references
520 $a The acoustoelectric effect in single-layer molybdenum disulfide (MoS2) and tungsten diselenide (WSe2) is studied in a hybrid setup. Such effects, which rely on the transfer of momentum from surface acoustic waves (SAWs), are generated on the surface of lithium niobate (LiNbO3) to the carriers in MoS2 and WSe2, resulting in an attenuation and velocity shift of the wave and giving rise to an acoustoelectric current. This dissertation examines the feasibility of integrating high-quality, single-layer MoS2 and WSe2 onto LiNbO3 to ultimately fabricate and characterize a hybrid chip that combines the functionality of a field-effect transistor (FET) and SAW device. MoS2 and WSe2 were synthesized by chemical vapor deposition (CVD) directly onto a chemically-reduced LiNbO3 substrate. LiNbO3 is a ferroelectric material that offers a unique blend of piezoelectric and birefringent properties, yet it lacks both optical activity and semiconductor transport. The prototypical device exhibits electrical characteristics that are competitive with MoS2 and WSe2 devices on silicon. These results demonstrate both a sound-driven battery and an acoustic photodetector, and ultimately open directions to non-invasive investigation of electrical properties of single-layer films. The experiments reveal close agreement between transport measurements utilizing conventional contacts and SAW spectroscopy. This approach will set forth the possibility of contact-free transport characterization of two-dimensional (2D) transition metal dichalcogenides (TMD) films, avoiding such concerns as the role of charge transfer at contacts as an artifact of such measurements.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Materials science. $3 557839
650 4 $a Engineering. $3 561152
655 7 $a Electronic books. $2 local $3 554714
690 $a 0794
690 $a 0537
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, Riverside. $b Materials Science and Engineering. $3 1187170
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10256727 $z click for full text (PQDT)