Towards monodisperse Silicon Nanocrystals: density gradient centrifugation applied on commercial gold nanoparticles
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The application of silicon nanocrystals as non-toxic bio-labels and downconverters requires their uniform size distribution in order to minimize the inhomogeneous broadening of the photoluminescence peak. In this thesis, we set the basis for their size-separation via the density-gradient centrifugation method. To be more precise, we successfully apply this technique to separate 5 and 10 nm gold nanoparticles from an ensemble by using an engineered medium layer stack. In addition, we explain how atomic force microscopy is used to measure the size of the nanoparticles, with a particular attentionon the removal of unwanted solvent-related effects. As a future plan, we will implement the technique for the size-separation of silicon nanocrystals.
Place, publisher, year, edition, pages
2016. , 48 p.
Silicon Nanocrystals, density gradient centrifugation, gold nanoparticles
IdentifiersURN: urn:nbn:se:kth:diva-186172OAI: oai:DiVA.org:kth-186172DiVA: diva2:925922
Master of Science - Nanotechnology
2016-04-15, KTH Kista, Isafjordsgatan 22, Kista, 10:00 (English)
Pevere, Federico, PhD
Linnros, Jan, Professor