Sökning: "nanocrystals"

Visar resultat 1 - 5 av 26 uppsatser innehållade ordet nanocrystals.

1. 1. Study of luminescent and energy properties of CsPbBr3 and CsPbI3 nanoplatelets

   L3-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Taddeo Salique; [2022]
   Nyckelord :quantum confinement; nanoplatelets; CsPbBr3; CsPbI3; semiconductor; exciton; perovskite nanocrystals;

   Sammanfattning : Halide perovskite semiconductor nanocrystals have been studied a lot recently because they allow a precise control over the entire visible emission spectrum and as a result, the possibility of a variety of light-emitting applications. In this study, cesium lead bromide CsPbBr3 and cesium lead iodide CsPbI3 nanoplatelets of 3, 4 and 5 monolayers (ML) have been synthesized. LÄS MER

3. 2. Photo-physical properties of up-converting NaYF4:Yb-Er,Yb-Mn nanocrystals

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Hongjian Wu; [2022]
   Nyckelord :Appled Physics; Tillämpad fysik;

   Sammanfattning : Rare earth-doped upconversion nanoparticles can emit light with various wavelength from ultraviolet to infrared when excited by near-infrared light. The superior properties including long luminescence lifetime, narrow emission spectra, low toxicity and high chemical stability makes it a promising optical material in bioimaging and other applications. LÄS MER

4. 3. Cellulose nanocrystals functionalized cellulose acetate electrospun membranes for adsorption and separation of nanosized particles

   Master-uppsats, Luleå tekniska universitet/Materialvetenskap

   Författare :José Ignacio Del Río De Vicente; [2021]
   Nyckelord :Electrospinning; Cellulose Nanocrystals; Filtration; Adsorption; Cellulose Acetate Fibers;

   Sammanfattning : Filtration and separation technologies remain as one of the biggest challenges humanity currently faces. The separation of different elements such as bacteria, viruses, heavy metals, particles, and chemical agents require the development of multifunctional membranes. LÄS MER

5. 4. Formulation of nanoemulsions stabilized by cellulose nanocrystals

   Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Författare :Marco Maccagno; [2020]
   Nyckelord :nanocellulose; hydroxypropyl methilcellulose; Pickering emulsions; microfluidization; drug delivery; nanocellulosa; hydroxipropylmetylcellulosa; Pickering emulsioner; microfluidization; drogleverans;

   Sammanfattning : Cellulose nanocrystals (CNCs) are bio-based nanoparticles with the ability to stabilize oil and water emulsions thanks to their intermediate wettability and nanometric size. These and other types of particle-stabilized emulsions, commonly referred to as Pickering emulsions, are of great academic and industrial interest due to their superior stability against drop coalescence compared to classical surfactant-stabilized emulsions. LÄS MER

7. 5. A Fabry–Pérot Cavity for Rare-Earth-Ion-Doped Nanocrystals

   Kandidat-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Andre Nüsslein; [2019]
   Nyckelord :Quantum Computer; Rear Earth Ions; Cavity; Laser; Cavity Quantum Electrodynamics; QED; Solidworks; Physics and Astronomy;

   Sammanfattning : This thesis work contributes to the effort of detecting single rare earth ions doped into crystals, an operation crucial for the development of rare earth quantum computer hardware. Doping crystals with rare earth elements, their trivalent ions substitute some of the crystal’s original bonds. LÄS MER