Sökning: "structural color"

Visar resultat 16 - 20 av 28 avhandlingar innehållade orden structural color.

1. 16. Tunning Multicolor Light Emission in Lead-free Materials

   Författare :Weidong Cai; Feng Gao; Jiajun Qin; Letian Dou; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multicolor light emission; Chiral material; Color change under humidity; Lead-free organic and inorganic material; Incorporation of extra emission center; Leadfree double perovskite; Co-doping; Flerfärgad ljusemission; Kiralt material; Färgförändring under fukt; Blyfritt organiskt och oorganiskt material; Inkorporering av extra emissionscenter; Blyfri dubbel perovskit; Samdopning;

   Sammanfattning : Perovskites are a class of compounds with the general formula ABX3 and becoming increasingly attractive recently. Because this kind of material possesses various advantages such as abundant raw materials, easy synthesis, excellent photoelectric properties, and short production process. LÄS MER

3. 17. Isotope labeling of proteins for spectroscopic studies

   Författare :Emil Gustavsson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Isotope labeling; Proteins; Cell-free protein expression; NMR; IR; Infrared;

   Sammanfattning : Protein structural dynamics have been closely tied to the molecular mechanisms controlling for example enzyme activities. In my work, I have mainly studied the bacteriophytochrome from Deinococcus radiodurans. LÄS MER

4. 18. 2D and 3D Halftoning for Appearance Reproduction

   Författare :Fereshteh Abedini; Sasan Gooran; Daniel Nyström; Jan Morovic; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The appearance of an object is determined by its chromatic and geometric qualities in its surrounding environment using four optical parameters: color, gloss, translucency, and surface texture. Reconstructing the appearance of objects is of great importance in many applications, including creative industries, packaging, fine-art reproduction, medical simulation, and prosthesis-making. LÄS MER

5. 19. Microwave-assisted transformations of lignin for value-added material applications

   Författare :Jenevieve G. Yao; Minna Hakkarainen; Karin Odelius; Monika Österberg; KTH; []
   Nyckelord :lignin; microwave-assisted processes; organosolv fractionation; esterification; fused filament fabrication; digital light processing; lignin; mikrovågsassisterade strategier; organosolv-fraktionering; förestring; additiv tillverkning; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : The chemical diversity and structural complexity of lignin, an abundant biopolymer found in vascular plants, present a multitude of opportunities for the modification and fine-tuning of its properties to suit downstream demands. In this thesis, microwave-assisted strategies were explored as efficient and environment-friendly pathways for lignin valorization towards value-added material applications. LÄS MER

7. 20. Understanding the interactions between vibrational modes and excited state relaxation in garnet structured phosphors

   Författare :Yuan-Chih Lin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; free electron laser; thermal quenching.; luminescence; garnet; vibrational spectroscopy; neutron scattering; phosphor; light emitting diode;

   Sammanfattning : This thesis concerns investigations of the local structural environments and vibrational dynamics of the three garnet type oxide phosphors Ce3+-doped Y3Al5O12 (YAG:Ce3+), Ca3Sc2Si3O12 (CSS:Ce3+), and Sr3Y2Ge3O12 (SYG:Ce3+), which show promising optical properties as luminescent materials used in solid state white lighting technologies. The study focuses on a comprehensive analysis of the nature of the long-range vibrations (phonons) in terms of local atomic and molecular motions of the garnet structure, as well as their dependence on the nature of the garnet chemical composition, Ce3+ concentration and temperature. LÄS MER