Adsorption of β-Casein–Surfactant Mixed Layers at the Air–Water Interface Evaluated by Interfacial Rheology

2012 ◽  
Vol 116 (16) ◽  
pp. 4898-4907 ◽  
Author(s):  
Armando Maestro ◽  
Csaba Kotsmar ◽  
Aliyar Javadi ◽  
Reinhard Miller ◽  
Francisco Ortega ◽  
...  
Keyword(s):  
Interfacial Rheology ◽  
Water Interface ◽  
Air Water Interface ◽  
Mixed Layers

Langmuir-Blodgett films of One-dimensional Nanowires composed of Amphiphilic Tetrathiafulvalenes and Electron Acceptor

2008 ◽  
Vol 1144 ◽  
Author(s):  
Yoko Tatewaki ◽  
Junko Takizawa ◽  
Tatsuya Hatanaka ◽  
Mutsumi Kimura ◽  
Hirofusa Shirai
Keyword(s):  
Electron Acceptor ◽  
Room Temperature ◽  
The Other ◽  
Water Interface ◽  
One Dimensional ◽  
Langmuir Blodgett ◽  
Electrical Conductivities ◽  
Air Water Interface ◽  
Langmuir Blodgett Films ◽  
Mixed Layers

ABSTRACTWe found that novel amphiphilic tetrathiafulvalene (TTF; 1) organized into supramolecular assemblies by the addition of electron acceptor 2,3,5,6-tetrafluoro-7,7'f,8,8'f-tetracyano-p-quinodimethane (F4TCNQ) at the air-water interface. The assemblies on the air-water interface can be transferred onto the surface of mica and the morphologies of transferred films were investigated by AFM. The morphology of Langmuir-Blodgett films strongly depended on the ratio between 1 and F4TCNQ. Film of 1:1 mixture of 1 and F4TCNQ formed nanoscopic wires having an average dimension of 5.0 (height) × 70 (width) × 3000 (length) nm. On the other hand, the film of 2:1 mixture of 1 and F4TCNQ showed the mixed domains of wires and flat monolayers. Thus, the completely charge-transferred complex (1+)(F4TCNQ-) formed one-dimensional nanowires having a micrometer length. Room temperature electrical conductivities of cast film for 1:1 and 2:1 mixed layers of 1 and F4TCNQ were 2.4 × 10−4 and 8.0 × 10−5 S cm−1, respectively.

scholarly journals Tadpole-Shaped POSS-Based Copolymers and the Aggregation Behavior at Air/Water Interface

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Lin Zhu ◽  
Fang Chen ◽  
Xiaoyan Ma ◽  
Xiu Qiang ◽  
Zhiguang Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Block Copolymers ◽  
Surface Pressure ◽  
Self Assembly ◽  
Aggregation Behavior ◽  
Structure Evolution ◽  
Interfacial Rheology ◽  
Water Interface ◽  
Block Sequence ◽  
Air Water Interface

The aggregation behavior of three tadpole-shaped Polyhedral oligomeric silsesquioxane (POSS) based block copolymers using different blocks poly(methyl methacrylate) (PMMA) and poly(trifluoroethyl methacrylate) (PTFEMA) with different block sequence and ratio (POSS-PTFEMA161-b-PMMA236, POSS-PMMA277-b-PTFEMA130, and POSS-PMMA466-b-PTFEMA172) was investigated on the air-water interface. The interfacial rheology of three block copolymers was studied by surface pressure isotherm, compression modulus measurements, and compression and expansion hysteresis analysis on the Langmuir trough. The block sequence and ratio play a great role in self-assembly behavior at the interface. Based on surface pressure isotherm analysis, a thin film with low elasticity was achieved for the POSS-PTFEMA161-b-PMMA236. Moreover, for the block copolymer with same segment sequence (POSS-PMMA2-b-PTFEMA), the thin film compression capability is increased with increasing the PMMA ratio. The morphology of the deposited LB thin film was illustrated by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). We observed that a thin film was composed by crater-shaped quasi-2D micelles for POSS-PTFEMA-b-PMMA, while it was proved that only flaky texture was observed for both POSS-PMMA277-b-PTFEMA130 and POSS-PMMA466-b-PTFEMA172. The thickness and area of flaky aggregates were greatly related to PMMA ratio. The different interface self-assembly structure evolution was proposed based on the interfacial rheology and thin film morphology studies.

Jones-Ray effect on the organization of lysozyme in the presence of NaNO3 at an air/water interface: is it a cause or consequence?

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100638-100645 ◽  
Author(s):  
Maheshkumar Jaganathan ◽  
Aruna Dhathathreyan ◽  
Chellappan Selvaraju ◽  
Reinhard Miller
Keyword(s):  
Interfacial Rheology ◽  
Water Interface ◽  
Fluid Interface ◽  
Air Water Interface

Interfacial rheology confirms the Jones-Ray effect resulting from a synergy between lysozyme and NaNO3 at an air/fluid interface.

scholarly journals Foaming and adsorption behavior of bovine and camel proteins mixed layers at the air/water interface

2017 ◽  
Vol 151 ◽  
pp. 287-294 ◽  
Author(s):  
Roua Lajnaf ◽  
Laetitia Picart-Palmade ◽  
Hamadi Attia ◽  
Sylvie Marchesseau ◽  
M.A. Ayadi
Keyword(s):  
Adsorption Behavior ◽  
Water Interface ◽  
Air Water Interface ◽  
Mixed Layers

Interfacial rheology and aggregation behaviour of amphiphilic CBABC-type pentablock copolymers at the air–water interface: effects of block ratio and chain length

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 82869-82878 ◽  
Author(s):  
Zhiguang Li ◽  
Xiaoyan Ma ◽  
Duyang Zang ◽  
Xinghua Guan ◽  
Lin Zhu ◽  
...  
Keyword(s):  
Chain Length ◽  
Structure Evolution ◽  
Interfacial Rheology ◽  
Water Interface ◽  
Packing Model ◽  
Aggregation Behaviour ◽  
Air Water Interface ◽  
Pentablock Copolymers ◽  
Interface Effects

The interfacial rheology, aggregation behaviour and packing model of the structure evolution of three amphiphilic CBABC-type pentablock copolymers were investigated at the air–water interface.

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