Polarized fluorescence emission measurements in mixtures of 2-butoxyethanol, cetyltrimethylammonium bromide, and water

Langmuir ◽  
1990 ◽  
Vol 6 (12) ◽  
pp. 1750-1757 ◽  
Author(s):  
D. J. Jobe ◽  
Ronald E. Verrall
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Fluorescence Emission ◽  
Polarized Fluorescence

Direct Evidence for β-Cyclodextrin-Induced Aggregation of Ionic Surfactant below Critical Micelle Concentration

1994 ◽  
Vol 48 (11) ◽  
pp. 1428-1431 ◽  
Author(s):  
Yun-Bao Jiang ◽  
Xiu-Juan Wang
Keyword(s):  
Critical Micelle Concentration ◽  
Cetyltrimethylammonium Bromide ◽  
Surfactant Concentration ◽  
Direct Evidence ◽  
Sodium Dodecylsulfate ◽  
Fluorescence Emission ◽  
Peak Height ◽  
Ionic Surfactant ◽  
Fixed Amount ◽  
Induced Aggregation

The fluorescence emission of p-dimethylaminochalcone (DMAC) has been monitored in β-cyclodextrin (β-CD) and cetyltrimethylammonium bromide (CTMAB) or sodium dodecylsulfate (SDS) mixture. In the presence of a fixed amount of β-CD, a peak-shaped variation is observed in the curve of DMAC fluorescence intensity vs. surfactant concentration below critical micelle concentration (cmc). The peak height is dependent on β-CD concentration, and no peak is noted in the absence of β-CD. Such a peak-shaped variation in DMAC fluorescence emission is shown to be direct evidence for β-CD-induced aggregation of the surfactant below cmc in aqueous solution. The 1:1 surfactant/β-CD inclusion complex is the hydrophobic source inducing the aggregation.

scholarly journals nm-Resolution Functional Pattern Transfer to an Amorphous Elastomeric Material

2020 ◽  
Author(s):  
Tyson C Davis ◽  
Jeremiah O. Bechtold ◽  
Anni Shi ◽  
Erin N. Lang ◽  
Anamika Singh ◽  
...  
Keyword(s):  
Amorphous Material ◽  
Fluorescence Emission ◽  
Soft Robotics ◽  
Pattern Transfer ◽  
Length Scale ◽  
Wearable Electronics ◽  
Polarized Fluorescence ◽  
Elastomeric Material ◽  
Functional Patterns ◽  
Inorganic Nanowires

Here, we show that striped monolayers of diyne amphiphiles, assembled on graphite and photopolymerized, can be covalently transferred to polydimethylsiloxane (PDMS), an elastomer common in applications including microfluidics, soft robotics, wearable electronics, and cell culture. This process creates precision polymer films < 1 nm thick, with 1-nm-wide functional patterns, that control interfacial wetting, reactivity, and adsorption of flexible, ultranarrow inorganic nanowires. The polydiacetylenes exhibit polarized fluorescence emission, revealing polymer location, orientation, and environment, and resist engulfment, a common problem in PDMS functionalization. These findings illustrate a route for controlling surface chemistry well below the length scale of heterogeneity in an amorphous material.

scholarly journals nm-Resolution Functional Pattern Transfer to an Amorphous Elastomeric Material

2020 ◽  
Author(s):  
Tyson C Davis ◽  
Jeremiah O. Bechtold ◽  
Anni Shi ◽  
Erin N. Lang ◽  
Anamika Singh ◽  
...  
Keyword(s):  
Amorphous Material ◽  
Fluorescence Emission ◽  
Soft Robotics ◽  
Pattern Transfer ◽  
Length Scale ◽  
Wearable Electronics ◽  
Polarized Fluorescence ◽  
Elastomeric Material ◽  
Functional Patterns ◽  
Inorganic Nanowires

Here, we show that striped monolayers of diyne amphiphiles, assembled on graphite and photopolymerized, can be covalently transferred to polydimethylsiloxane (PDMS), an elastomer common in applications including microfluidics, soft robotics, wearable electronics, and cell culture. This process creates precision polymer films < 1 nm thick, with 1-nm-wide functional patterns, that control interfacial wetting, reactivity, and adsorption of flexible, ultranarrow inorganic nanowires. The polydiacetylenes exhibit polarized fluorescence emission, revealing polymer location, orientation, and environment, and resist engulfment, a common problem in PDMS functionalization. These findings illustrate a route for controlling surface chemistry well below the length scale of heterogeneity in an amorphous material.

Synthesis and investigation on processing-depending polarized fluorescence emission in thin-films of 2,2′-([2,2′-bithiophene]-5,5′-diyl)bis(5-octyl-4-phenyl-4H-thieno[2,3-c]pyrrol-6(5H)-one)

2017 ◽  
Vol 5 (39) ◽  
pp. 10320-10331 ◽  
Author(s):  
L. Favaretto ◽  
M. Zambianchi ◽  
S. G. Lopez ◽  
A. Mazzanti ◽  
C. Zanardi ◽  
...  
Keyword(s):  
Thin Films ◽  
Fluorescence Emission ◽  
Polarized Fluorescence

A new monoreduced thienopyrrole-dione ended oligothiophene showing polarized fluorescence emitting microstructures is reported.

Multifunctional Anthracene-Based Ni-MOF with Encapsulated Fullerenes: Polarized Fluorescence Emission and Selective Separation of C70 from C60

2021 ◽  
Author(s):  
Serhii I. Vasylevskyi ◽  
Guillaume Raffy ◽  
Stefan Salentinig ◽  
André Del Guerzo ◽  
Katharina M. Fromm ◽  
...  
Keyword(s):  
Fluorescence Emission ◽  
Selective Separation ◽  
Polarized Fluorescence

New Structure of CTAB Templated Silica Films as revealed by GISAXS coupled to HRTEM

2000 ◽  
Vol 628 ◽  
Author(s):  
Sophie Besson ◽  
Catherine Jacquiod ◽  
Thierry Gacoin ◽  
André Naudon ◽  
Christian Ricolleau ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Grazing Incidence ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Electronic Microscopy ◽  
Silica Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Hexagonal Arrangement ◽  
Spherical Micelles

ABSTRACTA microstructural study on surfactant templated silica films is performed by coupling traditional X-Ray Diffraction (XRD) and Transmission Electronic Microscopy (TEM) to Grazing Incidence Small Angle X-Ray Scattering (GISAXS). By this method it is shown that spin-coating of silicate solutions with cationic surfactant cetyltrimethylammonium bromide (CTAB) as a templating agent provides 3D hexagonal structure (space group P63/mmc) that is no longer compatible with the often described hexagonal arrangement of tubular micelles but rather with an hexagonal arrangement of spherical micelles. The extent of the hexagonal ordering and the texture can be optimized in films by varying the composition of the solution.

Polarized Fluorescence of Spin-coated Polymeric Thin Films

2007 ◽  
Vol 2 (2) ◽  
pp. 257-264
Author(s):  
Satoko Nishiyama ◽  
Masahiro Tajima ◽  
Yasuhiko Yoshida
Keyword(s):  
Thin Films ◽  
Polarized Fluorescence ◽  
Polymeric Thin Films
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