서브메뉴
검색
Design and Development of 2D Materials Based Nanocomposites
Design and Development of 2D Materials Based Nanocomposites
Detailed Information
- Material Type
- 단행본
- 0017361093
- Date and Time of Latest Transaction
- 20260202105705
- ISBN
- 9798263308230
- DDC
- 620.11
- Author
- Singh, Akash.
- Title/Author
- Design and Development of 2D Materials Based Nanocomposites
- Publish Info
- [Sl] : University of Illinois at Urbana-Champaign, 2024
- Publish Info
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- Material Info
- 91 p
- General Note
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- General Note
- Advisor: Li, Yumeng.
- 학위논문주기
- Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2024.
- Abstracts/Etc
- 요약In the forefront of materials science, 2D materials have emerged as a captivating research domain over the past two decades. Among these, graphene stands out as an exceptional 2D material with distinctive mechanical, thermal, and electrical properties, making it a critical component in applications spanning lightweight structural materials, versatile coatings, and flexible electronics. However, the high cost and complexity of experimental investigations have driven the adoption of computational simulations, particularly molecular dynamics (MD), to unveil the underlying microscopic origins of graphene's unique properties. Yet, such simulations have yielded varying results, owing to the use of diverse empirical interatomic potentials used in these MD simulations.This dissertation aims to create an accurate interatomic potentials for 2D materials like graphene by using an artificial neural network (ANN)-based interatomic potential. These ANN based machine learning interatomic potentials for graphene are trained from the training data developed using first-principle based atomistic simulations. Machine learning potential (MLP) helps us to run high-fidelity Molecular Dynamics (MD) simulations approaching the accuracy of first principle simulations but with a fraction of computational cost. These MLP enables larger-scale simulations and extended timeframes, thereby accelerating the design, development and discovery of novel graphene/graphene based nanomaterials. Also, this dissertation aims to showcase MLP's capability in estimating critical material properties of graphene, including coefficient of thermal expansion (CTE), lattice parameters, Young's modulus, yield strength with comparable accuracy of that of experimental and first-principle calculations found from previous literatures. Remarkably, MLP's capability in capturing dominant mechanisms governing the behaviour of CTE in graphene, including effects of changing lattice parameters and increasing/decreasing out-of-plane rippling with temperature, is a significant highlight of this dissertation. Furthermore, this MLP development method can be extended to other 2D materials, promising to expedite research on novel 2D materials and their unique atomic structures.Moving on to 2D materials-based nanocomposites, in today's scientific and technological landscape, have assumed a position of significant importance. These hybrid material systems merge organic molecules with inorganic 2D materials, creating a new dimension of functional materials with varied applications i.e. materials for photovoltaics, electronics, nanotribology to aerospace applications. The interfaces between these 2D material and polymers serves as prototype material systems for studying confinement-induced phase transitions in 2D material based nanocomposites. Thorough understanding of dynamic and static behaviour of atoms in these interfaces at small length (nanometers) and time scales (nanoseconds) is critical as it material behaviour at this scale dictates overall material property of the resulting material system. Thus understanding the interfacial behaviour at atomic level will lead in the development of deliberately engineered 2D material and polymer based nanocomposites. But till date, the complexities of experimental testing at these small length and time scales as well as theoretical modeling have hindered a comprehensive understanding of these hetero-interfaces and thereby our ability to use these materials for practical purposes. To address this issues, this dissertation aims to understand the behaviour of 2D material and polymer at these interfaces using molecular dynamics (MD) simulations. By conducting MD simulations we focus on the assembly of polyethylene chains on surface of two dimensional MoSe2 sheet (which serves as a representative material system in this study to analyse the behaviour of 2D material based nanocomposites). All-atom models were created to simulate the dynamic assembly of n-pentacosane chains, which serves as a proxy for polyethylene in this study, on the surface of two dimensional MoSe2 sheet. This study reveals that polyethylene molecules starts crystallizing from 2D MoSe2-polyethylene interface and the crystallization growth front (plane of crystallized polymer chains) moves quickly towards the bulk polyethylene chains starting from the 2D material-polymer interface. At equilibrium, the directional registry of polyethylene chains on the 2D material surface happens through the interplay of free energy of the surface, adhesive interfacial interactions, conformational entropy, and the presence of substrate corrugation. The results suggests the potential of 2D materials, such as MoSe2, as a template for creating 2D material-polymer nanocomposites with specific crystallization orientations creating deliberate anisotropy and thereby resulting in a material system with tunable material properties.
- Subject Added Entry-Topical Term
- Materials science
- Subject Added Entry-Topical Term
- Systems science
- Subject Added Entry-Topical Term
- Mechanical engineering
- Subject Added Entry-Topical Term
- Applied physics
- Subject Added Entry-Topical Term
- Nanotechnology
- Index Term-Uncontrolled
- 2D materials
- Index Term-Uncontrolled
- Machine learning potentials for graphene
- Index Term-Uncontrolled
- 2D materials nanocomposites
- Index Term-Uncontrolled
- Artificial neural network
- Index Term-Uncontrolled
- Molecular dynamics
- Added Entry-Corporate Name
- University of Illinois at Urbana-Champaign Industrial&Enterprise Sys Eng
- Host Item Entry
- Dissertations Abstracts International. 87-05B.
- Electronic Location and Access
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2024 us c eng d■001000017361093
■00520260202105705
■006m o d
■007cr#unu||||||||
■020 ▼a9798263308230
■035 ▼a(MiAaPQ)AAI32409916
■035 ▼a(MiAaPQ)124178
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aSingh, Akash.
■24510▼aDesign and Development of 2D Materials Based Nanocomposites
■260 ▼a[Sl]▼bUniversity of Illinois at Urbana-Champaign▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a91 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Li, Yumeng.
■5021 ▼aThesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2024.
■520 ▼aIn the forefront of materials science, 2D materials have emerged as a captivating research domain over the past two decades. Among these, graphene stands out as an exceptional 2D material with distinctive mechanical, thermal, and electrical properties, making it a critical component in applications spanning lightweight structural materials, versatile coatings, and flexible electronics. However, the high cost and complexity of experimental investigations have driven the adoption of computational simulations, particularly molecular dynamics (MD), to unveil the underlying microscopic origins of graphene's unique properties. Yet, such simulations have yielded varying results, owing to the use of diverse empirical interatomic potentials used in these MD simulations.This dissertation aims to create an accurate interatomic potentials for 2D materials like graphene by using an artificial neural network (ANN)-based interatomic potential. These ANN based machine learning interatomic potentials for graphene are trained from the training data developed using first-principle based atomistic simulations. Machine learning potential (MLP) helps us to run high-fidelity Molecular Dynamics (MD) simulations approaching the accuracy of first principle simulations but with a fraction of computational cost. These MLP enables larger-scale simulations and extended timeframes, thereby accelerating the design, development and discovery of novel graphene/graphene based nanomaterials. Also, this dissertation aims to showcase MLP's capability in estimating critical material properties of graphene, including coefficient of thermal expansion (CTE), lattice parameters, Young's modulus, yield strength with comparable accuracy of that of experimental and first-principle calculations found from previous literatures. Remarkably, MLP's capability in capturing dominant mechanisms governing the behaviour of CTE in graphene, including effects of changing lattice parameters and increasing/decreasing out-of-plane rippling with temperature, is a significant highlight of this dissertation. Furthermore, this MLP development method can be extended to other 2D materials, promising to expedite research on novel 2D materials and their unique atomic structures.Moving on to 2D materials-based nanocomposites, in today's scientific and technological landscape, have assumed a position of significant importance. These hybrid material systems merge organic molecules with inorganic 2D materials, creating a new dimension of functional materials with varied applications i.e. materials for photovoltaics, electronics, nanotribology to aerospace applications. The interfaces between these 2D material and polymers serves as prototype material systems for studying confinement-induced phase transitions in 2D material based nanocomposites. Thorough understanding of dynamic and static behaviour of atoms in these interfaces at small length (nanometers) and time scales (nanoseconds) is critical as it material behaviour at this scale dictates overall material property of the resulting material system. Thus understanding the interfacial behaviour at atomic level will lead in the development of deliberately engineered 2D material and polymer based nanocomposites. But till date, the complexities of experimental testing at these small length and time scales as well as theoretical modeling have hindered a comprehensive understanding of these hetero-interfaces and thereby our ability to use these materials for practical purposes. To address this issues, this dissertation aims to understand the behaviour of 2D material and polymer at these interfaces using molecular dynamics (MD) simulations. By conducting MD simulations we focus on the assembly of polyethylene chains on surface of two dimensional MoSe2 sheet (which serves as a representative material system in this study to analyse the behaviour of 2D material based nanocomposites). All-atom models were created to simulate the dynamic assembly of n-pentacosane chains, which serves as a proxy for polyethylene in this study, on the surface of two dimensional MoSe2 sheet. This study reveals that polyethylene molecules starts crystallizing from 2D MoSe2-polyethylene interface and the crystallization growth front (plane of crystallized polymer chains) moves quickly towards the bulk polyethylene chains starting from the 2D material-polymer interface. At equilibrium, the directional registry of polyethylene chains on the 2D material surface happens through the interplay of free energy of the surface, adhesive interfacial interactions, conformational entropy, and the presence of substrate corrugation. The results suggests the potential of 2D materials, such as MoSe2, as a template for creating 2D material-polymer nanocomposites with specific crystallization orientations creating deliberate anisotropy and thereby resulting in a material system with tunable material properties.
■590 ▼aSchool code: 0090.
■650 4▼aMaterials science
■650 4▼aSystems science
■650 4▼aMechanical engineering
■650 4▼aApplied physics
■650 4▼aNanotechnology
■653 ▼a2D materials
■653 ▼aMachine learning potentials for graphene
■653 ▼a2D materials nanocomposites
■653 ▼aArtificial neural network
■653 ▼aMolecular dynamics
■690 ▼a0794
■690 ▼a0790
■690 ▼a0548
■690 ▼a0652
■690 ▼a0215
■71020▼aUniversity of Illinois at Urbana-Champaign▼bIndustrial&Enterprise Sys Eng.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0090
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361093▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
Preview
Export
ChatGPT Discussion
AI Recommended Related Books
Detail Info.
- Reservation
- Not Exist
- My Folder
- First Request
- Non-Book Loan Application
- Nighttime Book Loan Application
Available after logging in.


