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Automated ELISA and Machine Learning-Enhanced Accuracy in Biosensing and Colorimetric Measurements
Automated ELISA and Machine Learning-Enhanced Accuracy in Biosensing and Colorimetric Meas...
Automated ELISA and Machine Learning-Enhanced Accuracy in Biosensing and Colorimetric Measurements

Detailed Information

Material Type  
 단행본
 
0017359879
Date and Time of Latest Transaction  
20260202105230
ISBN  
9798291567180
DDC  
610
Author  
Aalizadeh, Majid.
Title/Author  
Automated ELISA and Machine Learning-Enhanced Accuracy in Biosensing and Colorimetric Measurements
Publish Info  
[Sl] : University of Michigan, 2025
Publish Info  
Ann Arbor : ProQuest Dissertations & Theses, 2025
Material Info  
186 p
General Note  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
General Note  
Advisor: Fan, Xudong;Guo, L. Jay.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
Abstracts/Etc  
요약Modern biomedical diagnostics demand platforms that are accurate, compact, automated, and cost-effective. Conventional ELISA (enzyme-linked immunosorbent assay) systems, while reliable, are often bulky, manual, and expensive, limiting accessibility for decentralized testing. This dissertation addresses this gap by developing a miniaturized ELISA platform with a production cost of about $1200, integrating simple rotary and linear movements as the only required mechanical motions with custom three-dimensional printed components to automate liquid handling. Using interleukin-6 (IL-6) as a model system, the platform achieved an R² of 0.9937 with duplicate measurements and a limit of detection (LOD) of 7.13 pg/mL, matching or exceeding the performance of high-end commercial systems while offering significant reductions in size, complexity, and cost. Beyond automation, this dissertation focuses on leveraging machine learning to enhance optical biosensing accuracy without modifying the hardware. In both primary sensing methods, which are peak shift tracking and fixed-wavelength intensity modulation, traditional approaches rely on one-dimensional fitting and overlook the rich spectral information available. First, a Ridge Regression framework is applied to combine multiple resonant peak shifts in silicon nanorod arrays, achieving approximately three orders of magnitude improvement in mean squared error (MSE) of refractive index prediction compared to traditional single-peak tracking. Full-spectrum modeling is then explored across two optical structures, one based on silicon supporting sharp Mie resonances for peak shift-based sensing and another based on titanium where intensity modulation is the dominant response to the refractive index change. It is found that linear regression based full-spectrum analysis significantly enhances accuracy for intensity modulation-based index sensing, while for peak shift-based sensing, combining multiple peaks provides superior performance. Finally, experimental validation using colorimetric measurements shows that applying machine learning with twelve selected wavelengths results in more than a 5700-fold MSE reduction relative to the best single-wavelength result.
Subject Added Entry-Topical Term  
Biomedical engineering
Subject Added Entry-Topical Term  
Engineering
Subject Added Entry-Topical Term  
Nanotechnology
Index Term-Uncontrolled  
Machine learning
Index Term-Uncontrolled  
Biomedical diagnostics
Index Term-Uncontrolled  
Biosensing
Index Term-Uncontrolled  
Limit of detection
Index Term-Uncontrolled  
Colorimetric measurements
Added Entry-Corporate Name  
University of Michigan Electrical and Computer Engineering
Host Item Entry  
Dissertations Abstracts International. 87-02B.
Electronic Location and Access  
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■035    ▼a(MiAaPQ)AAI32271883
■035    ▼a(MiAaPQ)umichrackham006389
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a610
■1001  ▼aAalizadeh,  Majid.
■24510▼aAutomated  ELISA  and  Machine  Learning-Enhanced  Accuracy  in  Biosensing  and  Colorimetric  Measurements
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a186  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Fan,  Xudong;Guo,  L.  Jay.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aModern  biomedical  diagnostics  demand  platforms  that  are  accurate,  compact,  automated,  and  cost-effective.  Conventional  ELISA  (enzyme-linked  immunosorbent  assay)  systems,  while  reliable,  are  often  bulky,  manual,  and  expensive,  limiting  accessibility  for  decentralized  testing.  This  dissertation  addresses  this  gap  by  developing  a  miniaturized  ELISA  platform  with  a  production  cost  of  about  $1200,  integrating  simple  rotary  and  linear  movements  as  the  only  required  mechanical  motions  with  custom  three-dimensional  printed  components  to  automate  liquid  handling.  Using  interleukin-6  (IL-6)  as  a  model  system,  the  platform  achieved  an  R²  of  0.9937  with  duplicate  measurements  and  a  limit  of  detection  (LOD)  of  7.13  pg/mL,  matching  or  exceeding  the  performance  of  high-end  commercial  systems  while  offering  significant  reductions  in  size,  complexity,  and  cost.  Beyond  automation,  this  dissertation  focuses  on  leveraging  machine  learning  to  enhance  optical  biosensing  accuracy  without  modifying  the  hardware.  In  both  primary  sensing  methods,  which  are  peak  shift  tracking  and  fixed-wavelength  intensity  modulation,  traditional  approaches  rely  on  one-dimensional  fitting  and  overlook  the  rich  spectral  information  available.  First,  a  Ridge  Regression  framework  is  applied  to  combine  multiple  resonant  peak  shifts  in  silicon  nanorod  arrays,  achieving  approximately  three  orders  of  magnitude  improvement  in  mean  squared  error  (MSE)  of  refractive  index  prediction  compared  to  traditional  single-peak  tracking.  Full-spectrum  modeling  is  then  explored  across  two  optical  structures,  one  based  on  silicon  supporting  sharp  Mie  resonances  for  peak  shift-based  sensing  and  another  based  on  titanium  where  intensity  modulation  is  the  dominant  response  to  the  refractive  index  change.  It  is  found  that  linear  regression  based  full-spectrum  analysis  significantly  enhances  accuracy  for  intensity  modulation-based  index  sensing,  while  for  peak  shift-based  sensing,  combining  multiple  peaks  provides  superior  performance.  Finally,  experimental  validation  using  colorimetric  measurements  shows  that  applying  machine  learning  with  twelve  selected  wavelengths  results  in  more  than  a  5700-fold  MSE  reduction  relative  to  the  best  single-wavelength  result.
■590    ▼aSchool  code:  0127.
■650  4▼aBiomedical  engineering
■650  4▼aEngineering
■650  4▼aNanotechnology
■653    ▼aMachine  learning
■653    ▼aBiomedical  diagnostics
■653    ▼aBiosensing
■653    ▼aLimit  of  detection
■653    ▼aColorimetric  measurements
■690    ▼a0541
■690    ▼a0537
■690    ▼a0652
■690    ▼a0800
■71020▼aUniversity  of  Michigan▼bElectrical  and  Computer  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359879▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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