Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 410 for “"Visible light"”.
-
Nanophotonic visible light phased arrays
… Developing integrated optical phased arrays for visible wavelengths would enable the exploration of new applications for this technology, such as autostereoscopic displays and neuronal targeting for optogenetics. The work presented in this thesis involves the development of visible light …
-
Development of new visible-light mediated reactions
… green solvents and oxidants, one-pot reactions, visible light as an energy source, etc.). The research project focused on developing new methods for synthesizing amides and esters. These two functional groups are very important in organic chemistry because they are contained in several natural …
-
Visible light-induced pH control and its applications
This work explores how reversible light-induced pH changes can be increased and applied to control pH-responsive systems with light. Chapter 2 investigates how substitution patterns influence the acidity of merocyanine photoacids in the dark as well as under light irradiation. The parameters which …
-
High bandwidth neural interfacing using visible light communication
… optogenetics, which allow increasingly precise light mediated activation of nerve cells, the preference for mice was further reinforced where they are the primary animal of choice. However, the majority of currently available wireless devices are too big and heavy to allow the freely moving …
-
Nanoimprinting of Photonic Devices for Visible Light Applications
… proprieties that stem from the interaction of light with nanostructured matter. On the other hand, nanotechnology provides a key support to the research in photonics. In particular nanoimprint lithography (NIL) proved important to accelerate the development and prototyping of novel photonic …
-
High-Speed Organic Photodetectors for Visible Light Communication
… conventional rigid electronics. In recent years, visible light communication (VLC) has attracted considerable interest for use in in-home and sensor networks. Organic optoelectronic devices such as organic light-emitting diodes (OLEDs) and organic photodetectors (OPDs) have great potential for VLC …
-
Bridging infrared and visible light with nano-optics
… molecular vibrations that absorb and emit IR light. Instruments allowing us to look at the world in the IR enable medical diagnoses, pigment dating, greenhouse gas monitoring, and help us resolve the birth of stars by peering deeper into space than ever before with the James Webb Space …
-
VISIBLE-LIGHT-ACTIVE SEMICONDUCTOR HETEROJUNCTIONS FOR ENHANCED PHOTOCATALYTIC ACTIVITY
… modification of existing materials to enhance light harvesting, and increasing the number of active sites in order to buttress photocatalytic activity. In a semiconductor photocatalytic system, photo–induced electron-hole pairs are produced when a photocatalyst is illuminated by light with …
-
Visible light emission from Eu-containing Si-based materials
… and broad emission band, tunable in all the visible range, which can be of interest for many technological fields, while Eu3+ ions present less intense and sharp emission peaks at arround 600 nm. In this thesis, two different approaches able to take advantage of the properties of Eu ions have …
-
Towards the efficiency limit of visible light-emitting diodes
… to potentially enhance the efficiency of visible light-emitting diodes (LEDs) for high-power operation. By leveraging this special mode of solid-state lighting by incoherent electroluminescent radiation and with the focus on gallium-nitride (GaN) technologies, we experimentally demonstrate …
-
Survival of Antarctic Bacteria Exposed to Ultraviolet and Visible Light
… buffer with 2.0% NaC1 and exposed to sunlight (20,000 Lux), UV-C (1.0 X 10⁻⁶ W/cm²), UV-B (1.0 X 10⁻⁶ W/cm²) and UV-A (1.5 X 10⁻⁶ W/cm²). The cultures were diluted to a final absorbance of 0.01 at 540 nm for sunlight and to 0.1 for the UV light exposures. All strains were sensitive to …
-
Development of New Organic Photoredox Catalysis Driven by Visible Light
… Ph.D. study focuses on the development of novel visible-light mediated organic photoredox catalysis strategies for the construction of structurally diverse molecular architectures in distinct ways. In the first efforts, a metal- and oxidant-free organophotocatalytic method for preparing …
-
Antimicrobial Materials for Water Disinfection Based on Visible-Light Photocatalysts
The photocatalytic property of these visible-light-active photocatalysts were studied in the inactivation of bacteria and bacterial spores in water. Fast killing rate was obtained for the inactivation of E. coli, P. aeruginosa, S. aureus and B. subtilis endospores. The results of mechanistic study …
-
Copper Oxide Nano Photocatalyst for Wastewater Purification using Visible Light
… photocatalyst for wastewater purification using visible light. The presented copper oxide nano material can serve as a low-cost and green technology for environmental applications. Uniform cubic, octahedral and rhombic dodecahedral Cu2O nano crystals with a size of 300-600 nm were synthesized …
-
VRCodes : embedding unobtrusive data for new devices in visible light
… envisions a public space populated with active visible surfaces which appear different to a camera than to the human eye. Thus, they can act as general digital interfaces that transmit machine-compatible data as well as provide relative orientation without being obtrusive. We introduce a …
-
Photodegradation of peptides and proteins by near UV and visible light
… and oxidation of mAbs. While near UV and visible light can lead to the oxidation of mAbs, no concise mechanism has been established for the photo-oxidation of mAbs. Here, we evaluated the formation of reactive species by carboxylic acid buffer-Fe3+ complexes, which can absorb light and …
-
Visible Light Cured Thiol-vinyl Hydrogels with Tunable Gelation and Degradation
… applications. Ultraviolet (200-400 nm) or visible (400-800 nm) light can interact with light-sensitive compounds called photoinitiators to form radical species that trigger photopolylmerization. Since UV light has potential to cause cell damage, visible light-mediated photopolymerization …
Page 1 of 21