Phospholipid Langmuir Film as Template forin SituSilica Nanoparticle Formation at the Air/Water Interface

Langmuir ◽  
2009 ◽  
Vol 25 (23) ◽  
pp. 13328-13331 ◽  
Author(s):  
Hangsheng Li ◽  
Dirk Pfefferkorn ◽  
Wolfgang H. Binder ◽  
Jörg Kressler
Keyword(s):  
Water Interface ◽  
Langmuir Film ◽  
Nanoparticle Formation ◽  
Air Water Interface

Interaction of N-myristoylethanolamine with cholesterol investigated in a Langmuir film at the air–water interface

2009 ◽  
Vol 139 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Ravi Kanth Kamlekar ◽  
M. Sharath Chandra ◽  
T.P. Radhakrishnan ◽  
Musti J. Swamy
Keyword(s):  
Water Interface ◽  
Langmuir Film ◽  
Air Water Interface

Study of glucose oxidase–l-α-lecithin Langmuir film formation on air–water interface

2007 ◽  
Vol 7 (5) ◽  
pp. 490-495 ◽  
Author(s):  
Fan Yin ◽  
Kil-Yong Ryu ◽  
Hoon-Kyu Shin ◽  
Young-Soo Kwon
Keyword(s):  
Glucose Oxidase ◽  
Film Formation ◽  
Water Interface ◽  
Langmuir Film ◽  
Air Water Interface

scholarly journals Self-Assembly Properties of Amphiphilic Iron(III) Spin Crossover Complexes in Water and at the Air–Water Interface

2018 ◽  
Vol 4 (4) ◽  
pp. 49 ◽  
Author(s):  
Paulo N. Martinho ◽  
Irina A. Kühne ◽  
Brendan Gildea ◽  
George McKerr ◽  
Barry O’Hagan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Self Assembly ◽  
Spin Crossover ◽  
Water Soluble ◽  
Water Interface ◽  
Nanoparticle Formation ◽  
Alkyl Chains ◽  
Transmission Electron ◽  
Air Water Interface ◽  
Magnetic Profile

The assembly properties of three known spin crossover iron(III) complexes 1–3, at the air–water interface, are reported. All three complexes are amphiphiles, each bearing a pair of Cn alkyl chains on the polyamino Schiff base sal2trien ligand (n = 6, 12, or 18). Complex 1 is water-soluble but complexes 2 and 3 form Langmuir films, and attempts were made to transfer the film of the C18 complex 3 to a glass surface. The nature of the assembly of more concentrated solutions of 3 in water was investigated by light scattering, cryo-SEM (scanning electron microscopy), and TEM (transmission electron microscopy), all of which indicated nanoparticle formation. Lyophilization of the assembly of complex 3 in water yielded a powder with a markedly different magnetic profile from the powder recovered from the initial synthesis, notably, the spin crossover was almost completely quenched, and the thermal behavior was predominantly low spin, suggesting that nanoparticle formation traps the system in one spin state.

ENHANCED SHG IN POLYELECTROLYTE COMPLEXED HEMICYANINE DYE LANGMUIR–BLODGETT FILMS

2004 ◽  
Vol 13 (03n04) ◽  
pp. 347-353 ◽  
Author(s):  
M. SHARATH CHANDRA ◽  
Y. OGATA ◽  
J. KAWAMATA ◽  
T. P. RADHAKRISHNAN
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Convenient Method ◽  
Second Harmonic ◽  
Water Interface ◽  
Langmuir Film ◽  
Langmuir Blodgett ◽  
Air Water Interface ◽  
Hemicyanine Dye ◽  
Langmuir Blodgett Films

Complexation of ionic amphiphiles at the air–water interface by polyelectrolytes in the subphase has a pronounced effect of stabilization and deaggregation on the amphiphiles. We have effectively utilized the latter in the case of a hemicyanine dye based amphiphile. The aggregation of these amphiphiles is influenced by the rate of equilibration of the Langmuir film and the introduction of polyelectrolytes in the subphase is found to be a convenient method to suppress the aggregation. Langmuir–Blodgett films obtained by transfer of the polyelectrolyte complexed amphiphiles show enhanced second harmonic generation.

Glucose Sensor Based on Glucose Oxidase-Lipid LB Film Immobilized in Prussian Blue Layer

2008 ◽  
Vol 8 (9) ◽  
pp. 4543-4547 ◽  
Author(s):  
Dong-Yun Lee ◽  
A. K. M. Kafi ◽  
Won-Suk Choi ◽  
Sang-Hyun Park ◽  
Young-Soo Kwon
Keyword(s):  
Detection Limit ◽  
Prussian Blue ◽  
Glucose Oxidase ◽  
Modified Electrode ◽  
Glucose Sensor ◽  
Water Interface ◽  
Linear Calibration ◽  
Langmuir Film ◽  
Lipid Film ◽  
Air Water Interface

The structure and dynamic organization of a mixed Langmuir film of glucose oxidase (GOx) and lipid at the air–water interface were studied. The film was transferred onto the Prussian Blue (PB)-modified Pt electrode for biosensor preparation. The PB modified electrode showed well defined redox peaks in 0.1 M PBS electrolyte. The Langmuir film was characterized at the air–water interface by π-A isotherms. The mixed monolayer was formed by spreading GOx on the LB trough covered with lipid. Time-pressure results show that at least 90 minutes are required to reach the equilibrium state of GOx-lipid film. The monolayer was transferred onto the PB-modified electrode when surface pressure was 40 mN/m. This sensor was characterized by a very low detection limit and a wide linear range. The optimal conditions for both fabricating and response of the sensor were investigated. The proposed biosensor showed a linear calibration range from 5 × 10−6 to 6 × 10−5 M. The detection limit was determined to be 1.5 × 10−6 M.

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