(Zn2Al-LDH/ZnTPPS)n composite films with notable third-order optical nonlinearities

2018 ◽  
Vol 22 (09n10) ◽  
pp. 758-763 ◽  
Author(s):  
Xiaoyu Ren ◽  
Haizhou Ren ◽  
Yunshan Zhou ◽  
Lijuan Zhang ◽  
Farooq K. Shehzad ◽  
...  
Keyword(s):  
Self Assembly ◽  
Composite Films ◽  
Fine Tuning ◽  
Optical Absorption Coefficient ◽  
Index Formula ◽  
Third Order ◽  
Assembly Method ◽  
Vis Spectroscopy ◽  
Transparent Composite ◽  
Double Hydroxide

New inorganic-organic transparent composite films of the formula (Zn[Formula: see text]Al-LDH/ZnTPPS)[Formula: see text] were fabricated using exfoliated cationic Zn[Formula: see text]Al layered double hydroxide (Zn[Formula: see text]Al-LDH) nanosheets and anionic meso-tertra(4-sulfophenyl) zinc porphyrin (ZnTPPS) through an electrostatic layerbylayer self-assembly method. The resulting composite films were characterized by UV-vis spectroscopy (UV-vis) scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results showed that the films have relatively smooth and orderly surfaces, with the large ring plane of the porphyrin molecules vertically aligned LDH nanosheets and can grow in a nearly linear fashion with increasing the deposition cycles. Z-scan measurements, which were conducted under laser irradiation at a wavelength of 532 nm pulse width of 6 ns, repetition rate of 10 Hz and light intensity at focus [Formula: see text] of 10 [Formula: see text]J, revealed that the composite films have notable saturation absorption (cf., ZnTPPS in solution shows reverse saturation) and optical nonlinear self-defocusing behavior with the nonlinear optical absorption coefficient [Formula: see text] refractive index [Formula: see text], and third-order NLO susceptibility [Formula: see text] of the films increasing with the increase in number of layers of films ([Formula: see text] value is up to 7.86 × 10[Formula: see text] esu when [Formula: see text] 40), implying the NLO responses could be modified by fine tuning the thickness of composite films.

In Situ Self-Assembled Graphene-Polyaniline Nanocomposite Thin Films for Ammonia Gas Sensor

2014 ◽  
Vol 998-999 ◽  
pp. 63-66
Author(s):  
Ning Jie Guo ◽  
Hui Ling Tai ◽  
Zong Biao Ye ◽  
Guang Zhong Xie
Keyword(s):  
Gas Sensor ◽  
Self Assembly ◽  
Nanocomposite Film ◽  
Graphene Film ◽  
Ammonia Gas ◽  
Assembly Method ◽  
Vis Spectroscopy ◽  
Nanocomposite Thin Films ◽  
Polyaniline Nanocomposite

In this paper, the graphene-polyaniline (PANI) nanocomposite thin film was prepared by the in situ self-assembly method for the ammonia (NH3) gas sensor application, which was characterized by scanning electron microscopy (SEM) and UV-vis spectroscopy. The NH3 sensing performance and mechanism of the nanocomposite film were investigated. The results revealed that the sensor based on graphene-polyaniline nanocomposite film exhibited better sensing properties and restorability than those of single graphene film.

The Effect of Zinc to Aluminium Molar Ratio on the Physico-Chemical Properties of Zinc-Aluminium-3,4-Dichlorophenoxy Acetate Nanocomposite

2013 ◽  
Vol 756 ◽  
pp. 127-134
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Mohd Zobir Hussein ◽  
Siti Halimah Sarijo
Keyword(s):  
Layered Double Hydroxide ◽  
Mole Fraction ◽  
Self Assembly ◽  
Chemical Properties ◽  
Zinc Ion ◽  
Molar Ratio ◽  
Basal Spacing ◽  
Molar Ratios ◽  
Assembly Method ◽  
Double Hydroxide

Layered double hydroxide (LDH) hybrid materials of Zn-Al-layered double hydroxide-3,4-dichlorophenoxy acetate acidnanocomposites (ZADs) were prepared by direct self-assembly method. The pH of the solution was adjusted to 7.5 using 2M NaOH. Various Zn2+ to Al3+ molar ratios, R ranging from 1 to 6 were used with a fixed concentration of 3,4-D at 0.3 M. The Powder X-ray diffraction (PXRD) patterns showed the formation of well-ordered nanocomposite with the expansion of basal spacing from 8.9 Å in the Zinc-Aluminium-Layered Double Hydroxide (ZAL) to 18.7 - 22.1 Å in the resulting nanocomposites. The Fourier transform infrared (FTIR)spectra for the nanocomposites showed features for both ZAL and ZAD, showing the successful intercalation of the organic moiety into the LDH interlayer. The percentage loading of 3,4-dichlorophenoxy acetati acid(3,4-D) in LDH was found to be increased from 34.7-48.1 % (w/w), as the mole fraction of Al decreased from 0.44-0.15. This study shows that the mole fraction of zinc ion was replaced by aluminium ion in the LDH plays an important role in controlling the physic-chemical properties of the resulting material.

The assembly and photoelectronic property of reduced graphene oxide/porphyrin/phthalocyanine composite films

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 42063-42068 ◽  
Author(s):  
Meijuan Zhang ◽  
Bing Yuan ◽  
Shi-zhao Kang ◽  
Lixia Qin ◽  
Guodong Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
Composite Films ◽  
Layer By Layer ◽  
Assembly Method ◽  
Reduced Graphene ◽  
Porphyrin Phthalocyanine

By a layer-by-layer self-assembly method, reduced graphene oxide-based composite films with high photoelectronic activity were assembled with 5,10,15,20-tetrakis(p-N,N,N-trimethylanilinium)porphyrin and copper sulfophthalocyanine as the co-sensitizers.

Synthesis, Structural and Photoelectrical Properties of Self-Assembled Gold-Poly(3,4-Ethylenedioxythiophene) Nanowires and Nanocables

2013 ◽  
Vol 650 ◽  
pp. 200-205
Author(s):  
Bin Sun ◽  
Yun Ze Long ◽  
Meng Meng Li ◽  
Xiu Jie Hu ◽  
Ying Qun Qi ◽  
...  
Keyword(s):  
Self Assembly ◽  
Composite Films ◽  
Xenon Lamp ◽  
Multifunctional Composites ◽  
Photoelectrical Properties ◽  
Selected Area Electron Diffraction ◽  
Assembly Method ◽  
Transmission Electron ◽  
Potential Applications ◽  
Coaxial Nanocables

Gold-poly (3,4-ethylenedioxythiophene) (Au-PEDOT) nanowires with Au nanoparticles embedded in the polymer matrix and polyvinylpyrrolidone (PVP) modified Au-PEDOT coaxial nanocables with a core-shell structure have been synthesized by a new and facile self-assembly method. The morphology and structure features of the composites were characterized by transmission electron microscopy, selected-area electron diffraction, and energy-dispersive x-ray spectrometry. The room-temperature electrical conductivity of the casted composite films was about 0.21 S/cm. Photoresponse of the films were also investigated with respect to wide potential applications of the multifunctional composites. Clear photocurrent switching characteristic during switching on/off of a xenon lamp was observed.

Intercalation of Fenoprofen into Layered Double Hydroxide for the Formation of Controlled Release Anti-Inflammatory Drug

2017 ◽  
Vol 1142 ◽  
pp. 230-233 ◽  
Author(s):  
Siti Halimah Sarijo ◽  
Monica Limau Jadam ◽  
Faizah Md Saleh
Keyword(s):  
Controlled Release ◽  
Organic Compound ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Interlayer Spacing ◽  
Nanocomposite Materials ◽  
Molar Ratio ◽  
Hybrid Nanocomposite ◽  
Assembly Method ◽  
Double Hydroxide

Synthesis of a new hybrid nanocomposite materials, zinc-aluminium-fenoprofen, ZAF was successfully accomplished by self-assembly method with molar ratio of Zn to Al; R=2 at concentration of fenoprofen=0.3 M. As a result of the successful intercalation, the interlayer spacing expanded from 9.8 Å in the zinc-aluminium-layered double hydroxide, ZAL to 20.1 Å in the ZAF hybrid nanocomposite. The FTIR spectra of the ZAF show resemblance peaks of ZAL and fenoprofen indicating the inclusion of the organic compound into the LDH interlamellae. The percentage loading of the guest anion, fenoprofen in ZAL was estimated to be about 63.4% (w/w) calculated from the carbon content.

Graphene–CdS quantum dots–polyoxometalate composite films for efficient photoelectrochemical water splitting and pollutant degradation

2014 ◽  
Vol 16 (47) ◽  
pp. 26016-26023 ◽  
Author(s):  
Meng Wang ◽  
Xinke Shang ◽  
Xuelian Yu ◽  
Rongji Liu ◽  
Yongbing Xie ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Self Assembly ◽  
Nanocomposite Film ◽  
Electrical Response ◽  
Composite Films ◽  
Layer By Layer ◽  
Cds Quantum Dots ◽  
Pollutant Degradation ◽  
Assembly Method

rGO–CdS–H2W12 nanocomposite film was successfully fabricated by a layer-by-layer self-assembly method. The film showed good photo-electrical response under irradiation of solar light.

High thermal conductivity property of polyamide-imide/boron nitride composite films by doping boron nitride quantum dots

2019 ◽  
Vol 7 (44) ◽  
pp. 13896-13903 ◽  
Author(s):  
Shuaishuai Zhou ◽  
Tongle Xu ◽  
Fang Jiang ◽  
Na Song ◽  
Liyi Shi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Quantum Dots ◽  
Boron Nitride ◽  
Composite Film ◽  
Self Assembly ◽  
Composite Films ◽  
Conductivity Property ◽  
Assembly Method ◽  
Boron Nitride Nanosheet ◽  
Evaporation Induced Self Assembly

In this study, we report a flexible polyamide-imide (PAI)/boron nitride nanosheet (BNNS) composite film with improved thermal conductivity by doping boron nitride quantum dots (BNQDs) using an evaporation-induced self-assembly method.

Fabrication and Properties of a Nanocomposite Multilayer Film Based on a Polyoxometalate

2012 ◽  
Vol 67 (7) ◽  
pp. 673-677
Author(s):  
Jihong Liu ◽  
Tao Dong ◽  
Shuang Li ◽  
Huiyuan Ma ◽  
Bo Liu
Keyword(s):  
Atomic Force Microscopy ◽  
Self Assembly ◽  
Multilayer Film ◽  
Color Change ◽  
Layer By Layer ◽  
Force Microscopy ◽  
Assembly Method ◽  
Atomic Force ◽  
Good Electrocatalytic Activity ◽  
Vis Spectroscopy

A nanocomposite multilayer film based on a polyoxometalate Na16[P4W30Mn4 (H2O)2O112]·xH2O (Mn4P4W30) was fabricated by the layer-by-layer self-assembly method. It was characterized by UV/Vis spectra and atomic force microscopy (AFM). The electrochromic and electrocatalytic properties were explored using chronoamperometry (CA), UV/Vis spectroscopy and cyclovoltammetry (CV). The attractable feature is a color change of the film by the reduction of the polyoxometalate at different potentials. The film also exhibits good electrocatalytic activity toward the reduction of IO3-.

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