Synthesis of silver nanoparticle dimers
Author
Patel, Prerak Prakashbhai
Term
4. term
Education
Publication year
2019
Submitted on
2019-06-20
Pages
74
Abstract
Nanopartikel-dimere – par af to metalnanopartikler placeret meget tæt på hinanden – kan forstærke elektromagnetiske felter i nanoskala og dermed muliggøre ultrasensitive biosensorer. Dette projekt fokuserer på at fremstille dimere af sølvnanopartikler. Dimerne dannes ved at kombinere sølvnanoklynger, som fremstilles ved magnetron-sputtering (MaSCA) og deponeres på et polymerbelagt fast substrat, med kolloidale sølvnanopartikler fremstillet i opløsning. De resulterende nanopartikler og dimere vil blive undersøgt med: - Atomkraftmikroskopi (AFM) for at kortlægge overfladens form i nanoskala, - Scanning-elektronmikroskopi (SEM) for at optage detaljerede billeder af strukturerne, - UV-Vis absorptionsspektroskopi for at måle, hvordan de absorberer lys. Tilsammen skal disse metoder bekræfte, at de fremstillede dimere er dannet som ønsket og har de optiske egenskaber, der er relevante for følsom biosensing.
Nanoparticle dimers—pairs of metal nanoparticles placed very close together—can amplify electromagnetic fields at the nanoscale and open the door to ultrasensitive biosensors. This project focuses on making dimers from silver nanoparticles. The dimers are formed by combining silver nanoclusters produced by magnetron sputtering (MaSCA) and deposited on a polymer-coated solid substrate with colloidal silver nanoparticles prepared in solution. The resulting nanoparticles and dimers will be examined using: - Atomic Force Microscopy (AFM) to map surface shape at the nanoscale, - Scanning Electron Microscopy (SEM) to obtain detailed images of the structures, - UV-Vis absorption spectroscopy to measure how they absorb light. Together, these methods will verify that the dimers are created as intended and possess optical properties relevant for sensitive biosensing.
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