Electric-field-induced layer-by-layer fabrication of inorganic–organic hybrid second-order nonlinear optical films

Wang, Shiwei; Zhao, Lisha; Zhang, Xiaolong; Shi, Zuosen; Cui, Zhanchen; Yang, Yanqiang

doi:10.1016/j.jcis.2009.04.010

Cited by 11 publications

(9 citation statements)

References 73 publications

(73 reference statements)

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“…The SHG signal could be increased by increasing the number of deposition cycles and also with the increase of the azobenzene graft ratio in the polyion. Wang et al [74] proposed a method to fabricate an organic/inorganic hybrid NLO film by electric field-induced layer-by-layer deposition technique. The compound used to produce alternative layers is a new synthesized polycation from aromatic diazo group linked silicon and a chromophore molecule 2-({4-[4-(2carboxy-2-cyano-vinyl)-phenylazo]-phenyl}-methyl-amino)-ethyl acid (DRCB) as anion.…”

Section: Layer-by-layer Deposited Thin Filmsmentioning

confidence: 99%

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Synthesis and Nonlinear Studies on Selected Organic Compounds in Nanostructured Thin Films

Cinteză¹,

Marinescu²

2018

Advanced Surface Engineering Research

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Organic compounds based on ferrocene, pyrazolone, and octahydroacridine exhibit high interest due to their unusual structure, with potential practical applications due to their special optical properties. Nonlinear optical (NLO) properties of some new synthesized derivatives are evaluated in relationship with the chemical structure by using DFT molecular modeling. In condensed state, ferrocene and other organic molecules were found in a staggered arrangement (D5d) as a nonpolar molecule, but the eclipsed (D5h) and twisted (D5) forms exhibit SHG capabilities. The molecular polarizability (α), first-order hyperpolarizabilities (β tot), dipole (μ tot), and quadrupole (Q) moments were computed. The NLO efficiency was assessed by the relationship between high (β tot)a n dl o wH O M O-L U M O energy gap. The nonlinear optical properties of some new synthesized compounds were evaluated in thin films with nanometric morphology obtained using various methods: Langmuir-Blodgett (LB) thin films, sol-gel deposition, and layer-by-layer deposition.

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Section: Layer-by-layer Deposited Thin Filmsmentioning

confidence: 99%

“…Figure 13. The structure of the ADS-DRBC hybrid thin film (adapted with the permission from reference [74]).…”

Section: Theoretical Modelingmentioning

confidence: 99%

Synthesis and Nonlinear Studies on Selected Organic Compounds in Nanostructured Thin Films

Cinteză¹,

Marinescu²

2018

Advanced Surface Engineering Research

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“…LbL methods under applied voltages have attracted recent attention. − A counter electrode is arranged parallel to the substrate, and voltage is applied between the substrate and counter electrode during adsorption. Applied voltages influence the film deposition of polyelectrolytes, nanocrystals, nanoparticles, enzyme, and nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Effects of Applied Voltage and Solution pH in Fabricating Multilayers of Weakly Charged Polyelectrolytes and Nanoparticles

Omura

Kyung

Shiratori

et al. 2014

Ind. Eng. Chem. Res.

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The relationship between solution pH and effects of applied voltage in layer-by-layer (LbL) self-assembly was investigated, using weakly charged polyelectrolytes and nanoparticles. Poly(allylamine hydrochloride) (PAH)/poly(acrylic acid) (PAA) films and PAH/SiO 2 nanoparticle films were fabricated at several solution pH conditions, by LbL self-assembly under an applied voltage. Adsorption behavior and surface morphology of films fabricated under applied voltages depended on the solution pH. A textured structure was formed by applied voltage at a specific pH for PAH/PAA films. The effect of applied voltage on film deposition was related to the electrical charge density and polymer chain conformation. The effects of applied voltage were higher, when the polymer electrical charge density was higher, that is, when the polymer chain exhibited a stretched structure. It was found that the amount of adsorption increased at all pH conditions under the applied voltage. ■ INTRODUCTIONLayer-by-layer (LbL) self-assembly is a promising technique for fabricating uniform thin films composed of polyelectrolytes and nanoparticles. LbL films can be fabricated through the alternating adsorption of cationic and anionic solutions, with intermediary aqueous rinsing. LbL films are suitable for use as optical films, 1−3 antithrombotic films, 4 superhydrophobic films, 5,6 separation films, 7,8 biosensors, 9,10 and chemical sensors. 11 The eco-friendly method uses aqueous solutions to control the film thickness on the nanometer scale, under room temperature and ambient pressure. 12 Despite the LbL methods advantages, adsorption takes a long time, because it involves the electrostatic interaction of oppositely charged materials. 13 To improve the practical use of LbL self-assembly, it is necessary to reduce the adsorption duration. Fabricating LbL films rapidly has been attempted. 14 A spray LbL method has been developed, which significantly reduces the adsorption duration, and involves solutions sprayed directly onto substrates. 15−17 Applying external forces to the LbL process has also been studied to enhance adsorption, and applied magnetic fields and dynamic pressures reportedly accelerate LbL adsorption. 18−20 LbL methods under applied voltages have attracted recent attention. 21−32 A counter electrode is arranged parallel to the substrate, and voltage is applied between the substrate and counter electrode during adsorption. Applied voltages influence the film deposition of polyelectrolytes, nanocrystals, nanoparticles, enzyme, and nanotubes. Sun and co-workers reported that adsorbed volumes increased upon applying voltage, and dense poly(diallyldimethylammonium chloride (PDDA)/CdTe nanocrystal films could be fabricated. 25 Zhang and co-workers showed that PDDA/poly(sodium 4-styrenesulfonate) (PSS) and PDDA/PSS-ZrO2 film thickness and surface roughness increased upon applying a voltage. 21 Ko and co-workers fabricated linear poly(ethylene imine) (LPEI)/poly(acrylic acid) (PAA) films by LbL self-assembly under an applied voltage, and i...

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“…The macro-dipole moments of the a-helical rods in the peptide monolayer were aligned vertically and unidirectionally on the substrate, and the electron was flowed vectorially through the monolayer by coupled the macro-dipole moment of the peptide. Meanwhile, the electrostatic effects which can contribute the regulation of molecular orientation have been focused in a number of anisometric materials [27][28][29][30]. And an electric-field-enhanced self-assembly of the disulfide modified a-helical polypeptide having large macro-dipole moment was demonstrated by Samulski et al [31].…”

Section: Introductionmentioning

confidence: 99%

Electric-field-enhanced oriented cobalt coordinated peptide monolayer and its electrochemical properties

Wang

Fukuoka

Tsukigawara

et al. 2013

Journal of Colloid and Interface Science

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Electric-field-induced layer-by-layer fabrication of inorganic–organic hybrid second-order nonlinear optical films

Cited by 11 publications

References 73 publications

Synthesis and Nonlinear Studies on Selected Organic Compounds in Nanostructured Thin Films

Synthesis and Nonlinear Studies on Selected Organic Compounds in Nanostructured Thin Films

Effects of Applied Voltage and Solution pH in Fabricating Multilayers of Weakly Charged Polyelectrolytes and Nanoparticles

Electric-field-enhanced oriented cobalt coordinated peptide monolayer and its electrochemical properties

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