A novel green emitting NaGdF4:Dy3+,Ho3+ phosphor with tunable photoluminescence

2020 ◽  
Vol 44 (37) ◽  
pp. 16211-16217
Author(s):  
Hongxia Guan ◽  
Yunfei Li ◽  
Guixia Liu
Keyword(s):  
Green Light ◽  
Light Blue ◽  
Green Area ◽  
Co Doped

Dy3+,Ho3+ co-doped β-NaGdF4 nanomaterials emitted different shades of green light, which varies from the light blue area towards the blue-green area and ultimately to the green area with the increase of Ho3+ ions.

PHOTOCATALYTIC ACTIVITY OF NITROGEN AND FLUORINE CO-DOPED TITANIUM DIOXIDE PREPARED USING OF VARIOUS PH SOLUTIONS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3242-3247 ◽  
Author(s):  
MASAHIRO KATOH ◽  
AKIHIRO IMAYAMA ◽  
NARISUKE MORI ◽  
TOSHIHIDE HORIKAWA ◽  
TAHEI TOMIDA
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Uv Light ◽  
Anatase Phase ◽  
Wave Length ◽  
Green Light ◽  
Light Irradiation ◽  
Mixed Solution ◽  
Co Doped

Introducing different atoms into TiO 2 crystal lattice is a famous method to improve photocatalytic activity of TiO 2 under visible-light irradiation. In this paper, Nitrogen ( N ) and fluorine ( F ) co -doped TiO 2 powders were prepared by mixing TiCl 3 solutions with ammonium fluoride ( NH 4 F ). In preparation, we used NH 3- H 2 O solution for adjustment of pH values (pH 2, 7, and 9) of mixed solution. X-ray diffraction (XRD) indicated N , F - TiO 2 powders prepared at pH7 and pH9 contained only anatase phase, but the powders prepared at pH2 contained both anatase and rutile phase. The result of XRD also indicated N , F - TiO 2 powders prepared at pH7 had the smallest crystallite size. We measured photocatalytic activity of prepared N , F - TiO 2 powders by the decomposition of methylene blue. N , F - TiO 2 powder prepared at pH7 and pH9 showed same high photocatalytic activity under ultraviolet light irradiation (peak wave length = 352 nm). Furthermore, under green light LED irradiation (wave length = 525 nm), a sample prepared at pH7 decomposed methylene blue more quickly than any other samples. As the result, N , F - TiO 2 prepared at pH7 had the best catalytic activity under both UV-light and visible light in the all of N , F - TiO 2 prepared and reference TiO 2 photocatalyst (ST-01 produced by Ishihara Co. Ltd).

Study of optical properties and up-conversion mechanism in Nd3+/Yb3+ ions co-doped SiO2-Al2O3-Na2CO3-SrF2-CaF2 glasses for green light emitting display device applications

Optik ◽  
2018 ◽  
Vol 171 ◽  
pp. 918-924 ◽  
Author(s):  
Umamaheswar G. ◽  
Devarajulu G. ◽  
Rajesh Megala ◽  
Ramesh B. ◽  
John Sushma N. ◽  
...  
Keyword(s):  
Optical Properties ◽  
Green Light ◽  
Display Device ◽  
Light Emitting ◽  
Device Applications ◽  
Co Doped

scholarly journals PERBEDAAN KEPADATAN LALAT YANG HINGGAP PADA FLY GRILL YANG BERBEDA WARNA DI PAJAK SINGA KOTA KABANJAHE KABUPATEN KARO TAHUN 2018

2019 ◽  
Vol 14 (1) ◽  
pp. 69-75
Author(s):  
Erba Kalto Manik ◽  
Susanti Br Perangin-Angin
Keyword(s):  
Bacillary Dysentery ◽  
Green Light ◽  
Average Density ◽  
Life Activity ◽  
Body Hair ◽  
Light Blue ◽  
Anova Test ◽  
Amoebic Dysentery ◽  
Different Color ◽  
Light Green

Flies are Arthropoda insects that belong to the order of Diptera. Flies can transmit the disease through allthe limbs such as feces, vomit, body hair, limb hair and especially on the legs that have fine hairs so that theseeds of the disease can stick. Flies have a life activity interacting with a place that is a habitat for diseasessuch as trash, feces and carcasses. Plus its ability to fly 1-2 miles of several species of flies can spreadseveral diseases such as Thgypoid Fever, Parathypoid, bacillary dysentery, amoebic dysentery, and severaleye diseases from various places that have been visited. Flies are insects in general having sensitivity todifferent light wavelengths (colors). This research is a field experiment and includes a Pre Experiment that isPostest Only Design which aims to analyze differences in the density of flies that land on Fly Grill which aredifferent colors in Singa Kabanjahe Tax to plan control efforts which are about when, where and howcontrol will be carried out. in the Singa Kabanjahe Tax TPS for 10 days and the number of flies perched withdifferent fly grill colors (orange, pink, light blue, light green and yellow) for 30 seconds, calculating 10 timesthe calculation with the highest average. The data obtained were analyzed by ANOVA test with an error rateof 0.05. From the ANOVA test data with = 0.05 shows p = 0.221, which means that there is no difference indensity of flies perched on a different color fly grill. The average density of flies, from the lowest to thehighest is as follows: fly grill in orange, light green, light blue, pink and yellow ... The conclusion that can bedrawn is that flies do not like orange, light green and light blue. Meanwhile, the color favored by flies isyellow

Green light emission by Ce3+ and Tb3+ co-doped Sr3MgSi2O8 phosphors for potential application in ultraviolet whitelight-emitting diodes

2012 ◽  
Vol 44 (7) ◽  
pp. 2306-2311 ◽  
Author(s):  
Hong Yu ◽  
Wenwen Zi ◽  
Shi Lan ◽  
Shucai Gan ◽  
Haifeng Zou ◽  
...  
Keyword(s):  
Potential Application ◽  
Light Emission ◽  
Green Light ◽  
Green Light Emission ◽  
Co Doped

Re-Dispersible Li+ and Eu3+ Co-Doped Nanocrystalline ZnO: Luminescence and EPR Studies

2008 ◽  
Vol 8 (6) ◽  
pp. 3059-3062 ◽  
Author(s):  
R. S. Ningthoujam ◽  
N. S. Gajbhiye ◽  
Asar Ahmed ◽  
S. S. Umre ◽  
S. J. Sharma
Keyword(s):  
Oxygen Vacancy ◽  
Ethylene Glycol ◽  
Organic Solvent ◽  
Green Light ◽  
Urea Hydrolysis ◽  
Capping Agent ◽  
Zno Particles ◽  
Doped Zno ◽  
Co Doped

Nano-crystals of ZnO, Eu3+ doped ZnO, and Li+, Eu3+ co-doped ZnO have been prepared by urea hydrolysis in ethylene glycol medium at 150 °C. Ethylene glycol acts as capping agent for nanoparticles. Three colors 437 (blue), 540 (green) and 615 nm (red) from 2 at.% Li+ and 5 at.% Eu3+ co-doped ZnO have been observed from luminescence studies compared to that from 5 at.%. Eu3+ doped ZnO, which shows emission at 437 and 615 nm. It is established that green light is originated from the oxygen vacancy brought by Li+ incorporation into ZnO. Particles are re-dispersible in organic solvent such as ethanol, and are able to incorporate into polymer-based material such as SiO2 matrix.

scholarly journals The influence of light color on the rooting of 'Horim Golden' Chrysanthemum cuttings

2013 ◽  
Vol 39 (1) ◽  
pp. 47-57
Author(s):  
Edward Borowski ◽  
Lidia Kozłowska
Keyword(s):  
White Light ◽  
Red Light ◽  
Green Light ◽  
Morphological Differentiation ◽  
Root Systems ◽  
Carbohydrate Content ◽  
Light Blue ◽  
Mother Plants ◽  
Light Color ◽  
White Control

The influence of three different colors of light; blue, green and red, compared with white light as the control, on the rooting of <i>Chrysanthemum</i> cuttings, is presented in this paper. The mother plants and cuttings were irradiated during rooting with different colors of light. This was shown to have had visible influence on the morphological differentiation of cuttings. It also affected the carbohydrate content in them. The rooting of the cuttings reflected this influence. The cuttings obtained from plants grown under white (control) or red light were characterized by well-developed root systems in terms of the number, length and mass of the roots. The cuttings from the plants grown under green light were the worst. The influence of the color of the light on the speed with which the first roots were formed was the reverse. The cuttings from the plants irradiated with green light rooted the quickest, next in order were those from plants irradiated with blue, red and white light. Irradiating cuttings with differently colored light during rooting only had an effect on the number of roots formed. This number was high, close to that of control cuttings, in cuttings exposed to red light, decidedly lower in those exposed to blue and, in particular, green light.

Tunable color and energy transfer of Tm3+ and Ho3+ co-doped NaGdF4 nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (62) ◽  
pp. 50611-50616 ◽  
Author(s):  
Hongxia Guan ◽  
Guixia Liu ◽  
Jinxian Wang ◽  
Xiangting Dong ◽  
Wensheng Yu
Keyword(s):  
Energy Transfer ◽  
Hydrothermal Method ◽  
Luminescence Properties ◽  
Light Blue ◽  
Bluish Green ◽  
Co Doped

NaGdF4:Tm3+, Ho3+ nanoparticles with luminescence properties were synthesized by a hydrothermal method. The hues could be tuned from blue through to light blue and ultimately to bluish green.

scholarly journals Note on the Colour-Preference of Flies

1914 ◽  
Vol 14 (1) ◽  
pp. 46-47
Author(s):  
Edward Hindle
Keyword(s):  
Green Light ◽  
Colour Preference ◽  
House Flies ◽  
Light Blue ◽  
Dark Green ◽  
Black Slate ◽  
Pale Green

In the course of our investigations on the biology of flies, during the year 1912, a certain number of experiments were performed in order to ascertain whether house-flies possess any colour preference. In the case of mosquitoes, Nuttall (1901) has shown that these insects have a very well-defined preference for certain colours. When a number of boxes, lined with different coloured materials, were placed in a tent containing mosquitoes, the latter occurred most frequently on navy-blue, and, in descending order, on dark red, brown, scarlet, black, slate-grey, dark green, violet, leaf-green, blue, pearl-grey, pale green, light blue, ochre, white, orange, and yellow. Very few insects indeed were found to rest on the last seven colours.

scholarly journals Larviculture of two neotropical species with different distributions in the water column in light- and dark-colored tanks

2012 ◽  
Vol 10 (2) ◽  
pp. 439-444 ◽  
Author(s):  
Marcelo Mattos Pedreira ◽  
Edson Vieira Sampaio ◽  
José Cláudio Epaminondas dos Santos ◽  
Aldrin Vieira Pires
Keyword(s):  
Water Column ◽  
Condition Factor ◽  
Fish Larvae ◽  
Green Light ◽  
Light Blue ◽  
Neotropical Species ◽  
Lower Weight ◽  
Tank Color ◽  
Active Swimming ◽  
Effect Of Light

The influence of tank color on the visual perception of fish larvae and the success of their cultivation depends on the characteristics of each species combined with environmental factors. In this study, we determined the effect of light and dark tank colors on the larviculture of pacamã (Lophiosilurusalexandri), a species with a benthonic habit, and curimatá-pioa (Prochilodus costatus), which swims actively in the water column. Larvae of pacamã and curimatá-pioa were cultivated for 10 days in 5-L tanks, at a density of 15 larvae L-1 and luminosity of 141.7 ± 8.95 lux, and fed Artemia nauplii. Four tank colors were used: green, light blue, brown, and black (with four replications). Survival, biomass and Fulton's condition factor for pacamã larvae were similar in the different colored tanks. However, the larvae in the green tanks showed lower weight than those cultivated in black and brown tanks, as well as shorter total length than that of larvae in the brown-colored tanks. These results are probably due to the association between tank color and benthonic habitat of the pacamã. For the curimatá-pioa, survival and biomass were similar for the different colors. The weight and Fulton's condition factor were higher for the larvae cultivated in green and blue tanks. This result could be associated with the adaptation of curimatá-pioa larvae to active swimming in the water column, searching for prey.

Sign in / Sign up

Export Citation Format

Share Document