• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Mechanical Engineering
      • Dept. of Mechanical Engineering - Master's degree
      • View Item
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Mechanical Engineering
      • Dept. of Mechanical Engineering - Master's degree
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Sensing and characterization of single nanoparticles by vacuum-free nanoelectromechanical systems with an integrated polymeric lens

      Thumbnail
      Embargo Lift Date: 2023-08-09
      View / Download
      20.9 Mb
      Author(s)
      Erdoğan, Ramazan Tufan
      Advisor
      Hanay, Mehmet Selim
      Date
      2021-08
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
      Item Usage Stats
      197
      views
      2
      downloads
      Abstract
      Machines in the nanoscale dimension had the opportunity to become a top-notch choice to detect and characterize nanoparticles thanks to the rapid progress in micro-nano fabrication. Sensors that can detect and identify nanoparticles al-lowed the analysis of the physics on the scale of nanometers. In the last decade, nano-electromechanical systems are evolved with the integration of electronics to the mechanical nano dimensional structures to sense the mass of particles. Their small form factor, high sensitivity to mass changes, and compatibility with the microchip fabrication process placed NEMS in a position to be an excellent can-didate for sensing applications. In contrast, high sensitivity that is coming from their minuscule size of active area for mass detection comes with the cost of hav-ing minimal efficiency in capturing the nanoparticles in concern. Moreover, the need for vacuum equipment for the transportation of the nanoparticles confined NEMS-MS applications to the laboratories. Here, we resolved these problems by integrating a polymeric lens on top of the NEMS sensors in order to transport and direct the incoming nanoparticles, utilizing the electric field only, towards the minuscule active detection area; with exploiting change of the electric field in between nanoparticle source and NEMS, due to the accumulating surface charges over the polymeric lens. Therefore, we executed mass sensing measurements and obtained the mass spectrum of the 40 nm diameter gold nanoparticles and 100 nm diameter polystyrene nanoparticles without differential vacuum equipment, with a rapid analysis time and high capture efficiency.
      Keywords
      NEMS
      Nanoelectromechanical sensors
      Nanoparticle detection
      Mass spectrometry
      Permalink
      http://hdl.handle.net/11693/76452
      Collections
      • Dept. of Mechanical Engineering - Master's degree 86
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCoursesThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCourses

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 2976
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy