University of Hamburg

About: University of Hamburg is a education organization based out in Hamburg, Germany. It is known for research contribution in the topics: Population & Laser. The organization has 45564 authors who have published 89286 publications receiving 2850161 citations. The organization is also known as: Hamburg University.

One-pot synthesis of highly luminescent CdSe/CdS core-shell nanocrystals via organometallic and greener chemical approaches

Abstract: We report different approaches to the synthesis of size series of highly luminescent CdSe/CdS core−shell nanocrystals. The mixture of hexadecylamine (HDA)−trioctylphosphine oxide (TOPO)−trioctylphosphine (TOP) as stabilizing solvent was found to be very suitable for one-pot synthesis of nearly monodisperse CdSe nanocrystals followed by growing the CdS shell of a desired thickness. The obtained CdSe/CdS nanocrystals exhibited a narrow PL band (fwhm ∼27−35 nm) with reproducible room-temperature quantum yields as high as 50−85%. The emission color is tunable from green to red with increasing diameter of CdSe cores and/or thickness of the CdS shell. The possibility of preparing high-quality CdSe/CdS core−shell nanocrystals from the precursors cadmium acetate and H2S, which are more environmentally benign than conventional ones (e.g., dimethylcadmium) used in the organometallic synthesis of nanocrystals, was demonstrated. General aspects of the nanocrystal nucleation and growth as well as applicability of “gre...

Decoding the regulatory landscape of medulloblastoma using DNA methylation sequencing

Abstract: Medulloblastoma is a malignant childhood brain tumour presenting major clinical challenges; here, a comprehensive genome-wide DNA methylation data set from human and mouse tumours, coupled with analysis of histone modifications, RNA transcripts and genome sequencing, uncovers a wealth of alterations that provide insights into the epigenetic regulation of transcription and genome organization in medulloblastoma pathogenesis.