Second-order nonlinear optical thin films fabricated from ionically self-assembled monolayers

1997 ◽  
Author(s):  
James R. Heflin ◽  
Yanjing Liu ◽  
Charles Figura ◽  
Daniela Marciu ◽  
Richard O. Claus
Keyword(s):  
Thin Films ◽  
Nonlinear Optical ◽  
Second Order ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Control of Second-Order Nonlinear Optical Susceptibility in Ionically Self-Assembled Films by pH and Ionic Strength

1999 ◽  
Vol 598 ◽  
Author(s):  
C. Figura ◽  
P.J. Neyman ◽  
D. Marciu ◽  
C. Brands ◽  
M.A. Murray ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Nonlinear Optical ◽  
Second Order ◽  
Self Assembled Monolayers ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
Nlo Response ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
The Relationship

ABSTRACTIonically self-assembled monolayers have been recently shown to spontaneously produce the noncentrosymmetric ordering that is required for a second order nonlinear optical (NLO) response. The precise thickness of each monolayer is determined by variables such as the pH and ionic strength of the immersion solutions. We show here that the relationship between polymer conformation and layer thickness dramatically affects the magnitude of the NLO response. The largest χ(2) values are found in the thinnest films, indicating that the NLO response is determined primarily by chromophores located at the layer interfaces, as opposed to those within the bulk of a layer.

Self-assembled Monolayers Preparation and Characterization of BiFeO3 Thin Films

2009 ◽  
Vol 25 (1) ◽  
pp. 83-86 ◽  
Author(s):  
Guo-Qiang TAN ◽  
Hai-Yang BO ◽  
Hong-Yan MIAO ◽  
Ao XIA ◽  
Zhong-Liang HE
Keyword(s):  
Thin Films ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Nanoporous Thin Films Formed from Photocleavable Diblock Copolymers on Gold Substrates Modified with Thiolate Self-Assembled Monolayers

Langmuir ◽  
2020 ◽  
Vol 36 (31) ◽  
pp. 9259-9268 ◽  
Author(s):  
Takashi Ito ◽  
Herman Coceancigh ◽  
Yi Yi ◽  
Jay N. Sharma ◽  
Fred C. Parks ◽  
...  
Keyword(s):  
Thin Films ◽  
Diblock Copolymers ◽  
Self Assembled Monolayers ◽  
Gold Substrates ◽  
Assembled Monolayers ◽  
Self Assembled

Formation and stability of porphyrin and phthalocyanine self-assembled monolayers on ZnO surfaces

2016 ◽  
Vol 20 (08n11) ◽  
pp. 1264-1271 ◽  
Author(s):  
Hanna Hakola ◽  
Essi Sariola-Leikas ◽  
Paavo Jäntti ◽  
Thomas Mokus ◽  
Kati Stranius ◽  
...  
Keyword(s):  
Thin Films ◽  
Zno Nanorods ◽  
Self Assembled Monolayers ◽  
Layer Formation ◽  
Zno Film ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Anchoring Groups ◽  
The Stability ◽  
Phosphate Groups

Formation of self-assembled monolayers (SAMs) of three porphyrin and one phthalocyanine derivatives on thin ZnO film was studied by monitoring absorption spectra of the samples. The compounds were equipped with carboxylic or phosphate groups to bind to the surface. The SAM formation was found to be fast. The layer was formed in less than 15 min for all studied porphyrins, and 30 min was sufficient to form phthalocyanine layer. For porphyrins with different anchor groups the SAM formation was too fast to see any difference between the anchoring groups. The stability of SAMs was tested then by immersing the samples into neat solvents. Upon immersion the SAMs were gradually losing the absorbance for all the compounds with degradation trends being in line with p[Formula: see text] values of the binding groups of the same type. However, even for the weakest binding group the SAM was relatively stable after a few tens of minutes of washing, which was sufficient to remove physisorbed compounds but the SAM was essentially not destroyed. Comparison of SAMs on thin films with SAMs on ZnO nanorods and TiO2 nanoparticle films indicated the same fast layer formation but relatively weaker SAMs stability, showing 20–40% faster absorption losses during the washing.

The influence of 2D nanomaterials on electron transfer across molecular thin films

2019 ◽  
Vol 4 (2) ◽  
pp. 431-436
Author(s):  
Na Kong ◽  
Shuang Zhang ◽  
Jing Liu ◽  
Jianmei Wang ◽  
Zhen Liu ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Transfer ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
2D Nanomaterials ◽  
Electron Transfer Pathways ◽  
Molecular Thin Films ◽  
Self Assembled

Design and formation of electron transfer pathways across self-assembled monolayers by the hydrophobic attachment of BN-NH2 and MoS2 nanosheets.

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