Browsing by Author "Demir, Hilmi Volkan"
Now showing items 21-40 of 472
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Bio-nanohybrids of quantum dots and photoproteins facilitating strong nonradiative energy transfer
(Royal Society of Chemistry, 2013-05-21)Utilization of light is crucial for the life cycle of many organisms. Also, many organisms can create light by utilizing chemical energy emerged from biochemical reactions. Being the most important structural units of the ... -
Biomedical and biochemical tools of förster resonance energy transfer enabled by colloidal quantum dot nanocrystals for life sciences
(Springer Berlin Heidelberg, 2013)Semiconductor quantum nanocrystals (NCs) provide the ability to control and fine-tune peak emission wavelength using the size effect, with a broad optical absorption band (excitation window) increasing toward UV wavelength ... -
Blue InGaN/GaN-based quantum electroabsorption modulators
(IEEE, 2006)We introduce InGaN/GaN-based quantum electroabsorption modulator that incorporates ∼5 nm thick In0.35Ga0.65N/GaN quantum structures for operation in the blue spectral range of 420-430 nm. This device exhibits an optical ... -
Blue liquid lasers from solution of CdZnS/ZnS ternary alloy quantum dots with quasi ‐ continuous pumping
(Wiley - VCH Verlag GmbH & Co. KGaA, 2015)A blue (ca. 440 nm) liquid laser with an ultra‐low threshold through which quasi‐continuous wave pumping is accessible is achieved by engineering unconventional ternary CdZnS/ZnS alloyed‐core/shell QDs. Such an achievement ... -
Blue organic light-emitting diodes based on pyrazoline phenyl derivative
(Elsevier, 2012-01-21)The results of an experimental study of the electroluminescent device made of ITO/CuI/2,6-di-tert.-butyl-4-(2,5-diphenyl-3,4-dihydro-2H-pyrazol-3-yl)- phenol (HPhP)/3,6-Di(9-carbazolyl)-9-(2-ethylhexyl) carbazole (TCz1)/Ca:Al ... -
Blue quantum electroabsorption modulators based on reversed quantum confined Stark effect with blueshift
(AIP Publishing LLC, 2007-01-02)The authors present the design, growth, fabrication, experimental characterization, and theoretical analysis of blue quantum electroabsorption modulators that incorporate similar to 5 nm thick In0.35Ga0.65N/GaN quantum ... -
Blue-and red-shifting amplified spontaneous emission of CdSe/CdS core/shell colloidal quantum dots
(IEEE, 2013)We report blue- and red-shifting amplified spontaneous emission of CdSe/CdS quantum dots, controlled by varying core/shell dimensions and modifying exciton-exciton interactions, with low optical gain threshold of two-photon ... -
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage
(American Chemical Society, 2021-12-28)Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence ... -
A bright cadmium-free, hybrid organic/quantum dot white light-emitting diode
(American Institute of Physics, 2012-12-06)We report a bright cadmium-free, InP-based quantum dot light-emitting diode (QD-LED) with efficient green emission. A maximum brightness close to 700 cd/m2 together with a relatively low turn-on voltage of 4.5 V has been ... -
Bright future of deep-ultraviolet photonics: emerging UVC chip-scale light-source technology platforms, benchmarking, challenges, and outlook for UV disinfection
(American Chemical Society, 2022-04-28)The COVID-19 pandemic has generated great interest in ultraviolet (UV) disinfection, particularly for air disinfection. Although UV disinfection was discovered close to 90 years ago, only very recently has it reached the ... -
Bright White-Light Emitting Manganese and Copper Co-Doped ZnSe Quantum Dots
(Wiley, 2011)Doubly doped quantum dots with highly efficient (17 %) white-light emission (WLE) have been directly synthesized using a one-pot hot-injection technique (see picture). The generation of WLE was due to the judicious ... -
Brightly luminescent Cu-Zn-In-S/ZnS Core/shell quantum dots in salt matrices
(De Gruyter, 2019)In the past decades cadmium-free quantum dots (QDs), among which are quaternary colloidal Cu-Zn-In-S/ZnS (CZIS/ZnS) core/shell nanocrystals (NCs), have attracted great scientific interest. Particularly, their low toxicity ... -
Broad-band polarization-insensitive all-dielectric metalens enabled by intentional off-resonance waveguiding at mid-wave infrared
(American Institute of Physics, 2019)Metasurfaces are promising candidates to take the place of conventional optical components as they enable wavefront engineering at sub- and near-wavelength distances along both lateral and vertical directions. Plasmonic ... -
Cascading plasmonic and nonradiative energy transfer interactions by plasmon-coupling only donor or only acceptor quantum dots of the energy transfer pairs
(IEEE, 2010)Here we present the first proposition and demonstration of cascaded plasmonic and nonradiative energy transfer interactions that are controlled by selectively plasmon-coupling either only donor nanocrystals (NCs), also ... -
Cd-free Cu-doped ZnInS/ZnS Core/Shell nanocrystals: Controlled synthesis and photophysical properties
(SpringerOpen, 2018)Here, we report efficient composition-tunable Cu-doped ZnInS/ZnS (core and core/shell) colloidal nanocrystals (CNCs) synthesized by using a colloidal non-injection method. The initial precursors for the synthesis were used ... -
CdSe/CdSe1-xTex core/crown heteronanoplatelets: tuning the excitonic properties without changing the thickness
(American Chemical Society, 2017)Here we designed and synthesized CdSe/CdSe1-xTex core/crown nanoplatelets (NPLs) with controlled crown compositions by using the core-seeded-growth approach. We confirmed the uniform growth of the crown regions with ... -
CdSe/ZnS core-shell nanocrystal based scintillators for enhanced detection in UV
(IEEE, 2006)In this work, we present a novel scintillator that incorporates CdSe/ZnS core-shell nanocrystals to utilize both their high quantum fluorescence efficiency in the visible and high optical absorption in the UV for the purpose ... -
CdTe quantum dot-functionalized P25 titania composite with enhanced photocatalytic NO2 storage selectivity under UV and vis irradiation
(American Chemical Society, 2019)Composite systems of P25 (titania) functionalized with thioglycolic acid (TGA)-capped CdTe colloidal quantum dots (QDs) were synthesized, structurally characterized, and photocatalytically tested in the photocatalytic NOx ... -
A charge inverter for III-nitride light-emitting diodes
(American Institute of Physics Inc., 2016)In this work, we propose a charge inverter that substantially increases the hole injection efficiency for InGaN/GaN light-emitting diodes (LEDs). The charge inverter consists of a metal/electrode, an insulator, and a ... -
Chiral ceramic nanoparticles and peptide catalysis
(American Chemical Society, 2017)The chirality of nanoparticles (NPs) and their assemblies has been investigated predominantly for noble metals and II-VI semiconductors. However, ceramic NPs represent the majority of nanoscale materials in nature. The ...
