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Towards monodisperse Silicon Nanocrystals: density gradient centrifugation applied on commercial gold nanoparticles
KTH, School of Information and Communication Technology (ICT). (ICT-MNF)
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

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.
TRITA-ICT-EX, 2016:19
Keyword [en]
Silicon Nanocrystals, density gradient centrifugation, gold nanoparticles
National Category
Nano Technology
URN: urn:nbn:se:kth:diva-186172OAI: diva2:925922
Educational program
Master of Science - Nanotechnology
2016-04-15, KTH Kista, Isafjordsgatan 22, Kista, 10:00 (English)
Available from: 2016-05-03 Created: 2016-05-03 Last updated: 2016-05-03Bibliographically approved

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Khavari, Faraz
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