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Nanoscale Strain Gauges in Flexible Polymer for Biological Cell Force Measurement
Nanoscale Strain Gauges in Flexible Polymer for Biological Cell Force Measurement
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105605
- ISBN
- 9798265407078
- DDC
- 620.1
- 서명/저자
- Nanoscale Strain Gauges in Flexible Polymer for Biological Cell Force Measurement
- 발행사항
- [Sl] : Georgia Institute of Technology, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 197 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Brand, Oliver.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2023.
- 초록/해제
- 요약The goal of this work is to develop strain gauge based sensors in flexible polymers for the purpose of high-throughput mechanical testing of single blood platelets. It is important to measure the forces applied by cells, including blood platelets, in understanding tissue function and development, as well as in the regulation of biological functions, and how alterations in mechanical properties of tissues are associated with various diseases. The current available tools for measuring cell force are time-intensive, and high-throughput force measurements of single cells are difficult to conduct. The proposed research aims to develop a device which could be scaled, using micro- and nanofabrication techniques, and can convert the force exerted by a blood platelet cell (and potentially other types of cells) to an electrical signal, with a known and precise correlation.Embedding a strain gauge in a flexible polymer is the chosen approach for this research because strain gauges are a compact simple device and polymers can be biocompatible and tuned to mimic the softness of normal human tissue. There are different potential methods of fabricating a nanoscale strain gauge embedded in a soft polymer. The four main categories of patterning nanoscale metal structures on soft polymer substrates are shadow masks, direct writing, nanotransfer printing (nTP), and sacrificial layer methods, and a fifth category involves having a suspended flexible nanoscale metal structure suspended over a rigid substrate and then embedding it in a polymer. These methods are investigated with advantages and disadvantages discussed. In the process of investigating different fabrication methods, several new techniques were developed and are discussed. These include direct patterning of poly acrylic acid by electron beam lithography, nano-scale Bosch silicon etching, and SU-8 pillar patterning optimization by electron beam lithography.This research discusses the design, simulation, fabrication, and testing of gold nanoscale strain gauges embedded in soft PDMS using a sacrificial aluminum layer method. Additionally, suspended nickel nanowires of metal are investigated as an alternative to creating strain gauges on soft polymer substrates. Instead of embedding the nanowires in a PDMS substrate, they are suspended over an oxide cavity on a silicon substrate and the polymer can be added later. In both cases, the strain gauge should be sensitive to the compressive force of a blood platelet and occupy an area similar to the platelet's area to maximize sensitivity. Furthermore, a compact device design will allow for scalability as more devices per unit area can be fabricated. This research proposes two approaches based on a strain gauge resistor with 100 nm minimum features, which is an unusual design compared to most strain gauges that are larger in size.Furthermore, considerations are given for scaling up the sensing element of a blood platelet contractile force measurement system. To measure many platelets simultaneously, a large array of many strain gauges would be required. As these strain gauges generate analog voltages an analog to digital memory storage device would be required to store the data. Furthermore, to avoid input and output pin limitations a multiplexing function would be required to address the force sensing elements. How this can be achieved on a PDMS substrate and a rigid silicon substrate is discussed with each approach having advantages and disadvantages.
- 일반주제명
- Strain gauges
- 일반주제명
- Fixtures
- 일반주제명
- Crystal structure
- 일반주제명
- Polymers
- 일반주제명
- Polyvinyl chloride
- 일반주제명
- Gold
- 일반주제명
- Nanowires
- 일반주제명
- Electrodes
- 일반주제명
- Glass substrates
- 일반주제명
- Cardiomyocytes
- 일반주제명
- Plasma etching
- 일반주제명
- Polymethyl methacrylate
- 일반주제명
- Aluminum
- 일반주제명
- Design
- 일반주제명
- Silicon wafers
- 일반주제명
- Silica
- 일반주제명
- Blood platelets
- 일반주제명
- Ion beams
- 일반주제명
- Nickel
- 일반주제명
- Contact angle
- 일반주제명
- Analytical chemistry
- 일반주제명
- Materials science
- 일반주제명
- Nanotechnology
- 일반주제명
- Polymer chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2023 us c eng d■001000017360685
■00520260202105605
■006m o d
■007cr#unu||||||||
■020 ▼a9798265407078
■035 ▼a(MiAaPQ)AAI32316205
■035 ▼a(MiAaPQ)GeorgiaTech72686
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.1
■1001 ▼aBrown, Devin Kirkpatrick.
■24510▼aNanoscale Strain Gauges in Flexible Polymer for Biological Cell Force Measurement
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a197 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Brand, Oliver.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2023.
■520 ▼aThe goal of this work is to develop strain gauge based sensors in flexible polymers for the purpose of high-throughput mechanical testing of single blood platelets. It is important to measure the forces applied by cells, including blood platelets, in understanding tissue function and development, as well as in the regulation of biological functions, and how alterations in mechanical properties of tissues are associated with various diseases. The current available tools for measuring cell force are time-intensive, and high-throughput force measurements of single cells are difficult to conduct. The proposed research aims to develop a device which could be scaled, using micro- and nanofabrication techniques, and can convert the force exerted by a blood platelet cell (and potentially other types of cells) to an electrical signal, with a known and precise correlation.Embedding a strain gauge in a flexible polymer is the chosen approach for this research because strain gauges are a compact simple device and polymers can be biocompatible and tuned to mimic the softness of normal human tissue. There are different potential methods of fabricating a nanoscale strain gauge embedded in a soft polymer. The four main categories of patterning nanoscale metal structures on soft polymer substrates are shadow masks, direct writing, nanotransfer printing (nTP), and sacrificial layer methods, and a fifth category involves having a suspended flexible nanoscale metal structure suspended over a rigid substrate and then embedding it in a polymer. These methods are investigated with advantages and disadvantages discussed. In the process of investigating different fabrication methods, several new techniques were developed and are discussed. These include direct patterning of poly acrylic acid by electron beam lithography, nano-scale Bosch silicon etching, and SU-8 pillar patterning optimization by electron beam lithography.This research discusses the design, simulation, fabrication, and testing of gold nanoscale strain gauges embedded in soft PDMS using a sacrificial aluminum layer method. Additionally, suspended nickel nanowires of metal are investigated as an alternative to creating strain gauges on soft polymer substrates. Instead of embedding the nanowires in a PDMS substrate, they are suspended over an oxide cavity on a silicon substrate and the polymer can be added later. In both cases, the strain gauge should be sensitive to the compressive force of a blood platelet and occupy an area similar to the platelet's area to maximize sensitivity. Furthermore, a compact device design will allow for scalability as more devices per unit area can be fabricated. This research proposes two approaches based on a strain gauge resistor with 100 nm minimum features, which is an unusual design compared to most strain gauges that are larger in size.Furthermore, considerations are given for scaling up the sensing element of a blood platelet contractile force measurement system. To measure many platelets simultaneously, a large array of many strain gauges would be required. As these strain gauges generate analog voltages an analog to digital memory storage device would be required to store the data. Furthermore, to avoid input and output pin limitations a multiplexing function would be required to address the force sensing elements. How this can be achieved on a PDMS substrate and a rigid silicon substrate is discussed with each approach having advantages and disadvantages.
■590 ▼aSchool code: 0078.
■650 4▼aStrain gauges
■650 4▼aFixtures
■650 4▼aCrystal structure
■650 4▼aPolymers
■650 4▼aPolyvinyl chloride
■650 4▼aGold
■650 4▼aNanowires
■650 4▼aElectrodes
■650 4▼aGlass substrates
■650 4▼aCardiomyocytes
■650 4▼aPlasma etching
■650 4▼aPolymethyl methacrylate
■650 4▼aAluminum
■650 4▼aDesign
■650 4▼aSilicon wafers
■650 4▼aSilica
■650 4▼aBlood platelets
■650 4▼aIon beams
■650 4▼aNickel
■650 4▼aContact angle
■650 4▼aScanning electron microscopy
■650 4▼aAnalytical chemistry
■650 4▼aMaterials science
■650 4▼aNanotechnology
■650 4▼aPolymer chemistry
■690 ▼a0389
■690 ▼a0486
■690 ▼a0794
■690 ▼a0652
■690 ▼a0495
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360685▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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