자료유형  

 학위논문

Control Number  

0016934084

International Standard Book Number  

9798380388405

Dewey Decimal Classification Number  

620.5

Main Entry-Personal Name  

Wen, Chengyu.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Pennsylvania., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(149 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-03, Section: B.

General Note  

Advisor: Johnson, A. T. Charlie.

Dissertation Note  

Thesis (Ph.D.)--University of Pennsylvania, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약2D materials is a rapidly expanding class of materials that have captivated academia and industry with their ultrathin nature and remarkable properties. Graphene, the first discovered material, shows exceptional mechanical strength and superior electrical properties, presenting exciting probabilities in many applications. Combined with its large surface area and biocompatibility, graphene is particularly promising for the development of highly sensitive and selective biosensors. However, the application of graphene is limited by its lack of a bandgap, making it unusable for advanced logic circuits. 2D materials beyond graphene are thus being explored. Transition metal dichalcogenides (TMDs) are representative candidates possessing a variety of properties including tunable bandgaps. Conventionally, both graphene and TMDs are produced by mechanical exfoliation, but this method is low-yield and not suitable for large-scale applications such as biosensing. Therefore, a reliable synthesis strategy for these materials is urgently needed. In this thesis, synthesis of graphene and TMDs by chemical vapor deposition (CVD) is explored. The CVD synthesized graphene sheet has monolayer structure which can be inch scale in size, enabling the scalable fabrication of graphene biosensors. We develop the fabrication process of graphene biosensors and explore their biosensing applications, where the sensors are used to study the interaction between a specially designed water-soluble mu opioid receptor (wsMOR) and G-protein. The biosensors are able to record the in vitro interaction between the two molecules with high sensitivity. The CVD growth of TMDs is also investigated. Rapid growth of inch-scale monolayer MoSe2 continuous film has been synthesized on insulating substrates, based on a spin-coating, NaCl assisted CVD approach. This approach is promising to be extended to the growth of other semiconducting TMDs, benefit to the batch production of large-area TMD electronics. Additionally, we studied the CVD synthesis of TMDs with controlled layer numbers at controlled locations. Various approaches are used to demonstrate the high quality of the materials and field-effect transistor measurements indicate their potential in making advanced electronic devices.

Subject Added Entry-Topical Term  

Nanotechnology.

Subject Added Entry-Topical Term  

Condensed matter physics.

Subject Added Entry-Topical Term  

Nanoscience.

Subject Added Entry-Topical Term  

Electrical engineering.

Index Term-Uncontrolled  

Biosensing

Index Term-Uncontrolled  

Chemical vapor deposition

Index Term-Uncontrolled  

Field-effect transistors

Index Term-Uncontrolled  

Graphene

Index Term-Uncontrolled  

Transition metal dichalcogenides

Added Entry-Corporate Name  

University of Pennsylvania Electrical and Systems Engineering

Host Item Entry  

Dissertations Abstracts International. 85-03B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:641161