scholarly journals Properties of Y-Shaped PFO-DBT Nanotubes

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Muhamad Saipul Fakir ◽  
Azzuliani Supangat ◽  
Khaulah Sulaiman
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Aging Time ◽  
Light Absorption ◽  
Aging Process ◽  
Solution Annealing ◽  
Structural And Optical Properties

Immersion of template into solution is used to synthesize the Y-shaped poly[2,7-(9,9-dioctylfluorene)-alt-4,7-bis(thiophen-2-yl)benzo-2,1,3-thiadiazole] (PFO-DBT) nanotubes. Solution annealing and different aging times (1, 24, and 72 hours) are conducted to synthesize the Y-shaped PFO-DBT nanotubes and the effects on the morphological, structural, and optical properties of Y-shaped PFO-DBT nanotubes are investigated. The dense, aligned, and elongated Y-shaped PFO-DBT nanotubes have been successfully fabricated by aging the PFO-DBT solution for 72 hours. Enhanced light absorption with less light scattering can be exhibited from the elongated Y-shaped PFO-DBT nanotubes. Partial and complete infiltration is governed by 1 hour and 72 hours of aging time, respectively. Preformed nanofibres are initiated by the process of annealing and aging of PFO-DBT solution. During the aging process, PFO-DBT nanofibres are formed to coat the pores’ wall and replicated the Y-branched nanopores for the production of Y-shaped PFO-DBT nanotubes. The effects of solution annealing and aging process are essential for the improvement on the morphological, structural, and optical properties of Y-shaped PFO-DBT nanotubes.

Recent Advances and the Design Criteria of Metal Sulfide Photocathode and Photoanode for Photoelectrocatalysis

2021 ◽  
Author(s):  
Cui Ying Toe ◽  
Shujie Zhou ◽  
Michael Gunawan ◽  
Xinxin Lu ◽  
Yun Hau Ng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Light Absorption ◽  
Rapid Development ◽  
Metal Sulfide ◽  
Metal Sulfides ◽  
Design Criteria ◽  
Structural And Optical Properties ◽  
Recent Advances ◽  
Favorable Light

Metal sulfides have emerged as promising materials for photoelectrochemical (PEC) applications due to their favorable light absorption ability, tunable structural and optical properties. With the rapid development of PEC systems,...

Electrical, structural and optical properties of fluorine-doped zinc oxide thin films: Effect of the solution aging time

2009 ◽  
Vol 518 (4) ◽  
pp. 1279-1282 ◽  
Author(s):  
S.M. Rozati ◽  
S. Moradi ◽  
S. Golshahi ◽  
R. Martins ◽  
E. Fortunato
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Aging Time ◽  
Oxide Thin Films ◽  
Structural And Optical Properties

scholarly journals Optical properties of a heated aerosol in an urban atmosphere: a case study

2010 ◽  
Vol 3 (2) ◽  
pp. 1583-1614
Author(s):  
J. Backman ◽  
A. Virkkula ◽  
T. Petäjä ◽  
M. Aurela ◽  
A. Frey ◽  
...  
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Light Absorption ◽  
Volume Fraction ◽  
Measurement Techniques ◽  
Single Scattering ◽  
Urban Atmosphere ◽  
Urban Aerosol ◽  
Different Temperatures ◽  
Scattering Material

Abstract. Light absorption measurements most commonly rely on filter-based measurement techniques. These methods are disturbed by light scattering constituents in the aerosol phase deposited on the filters. The light scattering material changes the optical path of light in the filter matrix increasing the light absorption of the filter. Measurement equipment interpret this wrongly as light absorption by the aerosol. Most light scattering constituents in a sub-micron aerosol are volatile by their nature and they can be volatilized by heating the sample air. This volatilisation significantly alters the optical properties of the urban aerosol and was studied during a short field campaign with two groups of equipment measuring in parallel for six days in April 2009 at the SMEAR III station in Helsinki. When heated, the light scattering constituents were evaporated thus reducing the single-scattering albedo (ω0) of the aerosol by as much as 0.4. With less light scattering constituents in the aerosol phase the mass absorption cross section (MAC) of soot was calculated to be 13.5±0.5 m2 g−1 at λ=545 nm. An oven was set to scan different temperatures which revealed the volatility of the urban aerosol at different temperatures as well as the single-scattering albedo's dependence on the non-volatile volume fraction remaining (NVFR). At 50 °C 79±13% of the volume remained while only 46±8% remained at 150 °C and just 23±6% at 280 °C. At 50 °C ω0 was 0.65±0.06, at 150 °C ω0=0.54±0.06 and at 280 °C ω0=0.33±0.06. We found that absorption coefficients measured at different temperatures showed a temperature dependency possibly indicating initially different mixing states of the non-volatile constituents.

Structural and Optical Properties of Cu2ZnSn(SxSe1–x)4 Thin Films

2018 ◽  
Vol 23 (3) ◽  
pp. 230-239
Author(s):  
E.P. Zaretskaya ◽  
◽  
V.F. Gremenok ◽  
A.V. Stanchik ◽  
A.N. Pyatlitski ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Structural And Optical Properties
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