Gold Nanoparticles: Synthesising, Characterizing and Reviewing Novel Application in Recent Years

AbstractIn this paper we report the synthesis of gold nanoparticles during laser ablation of a metal gold plate in distilled water. The experiments were performed with a first harmonic (1064nm, 6ns, 10Hz) output of a Nd:YAG laser varying the operative fluency between 5Jcm-2 and 15Jcm-2. The results indicate that gold nanoparticles are synthesized at room temperature.In this paper we give an overview of the properties of gold relevant to its potential application in molecular-scale devices absorption spectroscopy and Transmission Electron Microscopy (TEM) were employed to determine the optical properties and size of gold nanoparticles. And novel applications of gold nanoparticles have been studied in various fields

Measurement of Nonlinear Optical Responses of Ag Thin Films

In this paper we report the preparation of silver nanoparticle thin films by cylindrical direct current reactive magnetron sputtering (at 10-5 torr initial pressure) and characterization of their nonlinear optical properties. BK7 glasses were selected as substrate. Nonlinear optical response of silver nanoparticle thin films was measured by moiré deflectometry technique using 15 mW He-Ne laser illuminations. All fabricated silver nanoparticle thin films were evaluated using atomic force microscopy and spectrophotometry (from visible region to near infrared region)

Studying the Recent Improvements in Holograms for Three-Dimensional Display

Displayers tend to become three-dimensional. The most advantage of holographic 3D displays is the possibility to observe 3D images without using glasses. The quality of created images by this method has surprised everyone. In this paper, the experimental steps of making a transmission hologram have been mentioned. In what follows, current advances of this science-art will be discussed. The aim of this paper is to study the recent improvements in creating three-dimensional images and videos by means of holographic techniques. In the last section we discuss the potentials of holography to be applied in future

A Study on Advances in Creating 3D Holographic Images and Optical Applications of Holography

Nowadays, the most beautiful 3D pictures and movies are created by means of holograms. The most advantage of this technique is the possibility to observe 3D images without using glasses. The quality of created images by this method has surprised everyone. In this paper, the experimental steps of making a transmission hologram have been mentioned. In what follows, current advances of this science–art will be discussed. In another section of this paper the optical application of holography has been reviewed. Finally, the predictions for the future of holography have also been studied

Optical and morphological characterization of nanostructured AgO thin films

Silver oxide (AgO) thin films were prepared by using a cylindrical direct current reactive magnetron sputtering system at 10−5 torr initial pressure on BK7 glass substrate. Samples deposited for 3, 5 and 7 minutes. Surface characterization of AgO thin films in the nanometer scale can be accurately determined using the atomic force microscopy (AFM) and X-ray diffraction (XRD). The average roughness (Ravg), maximum peak to valley height (Rt) and root mean square (Rrms) roughness are used to analyze the surface morphology of AgO films. The linear optical absorption data were measured in the visible-near infrared spectral regions and the nonlinear refractive index (n2) of thin films is evaluated by the moiré deflectometery technique. The investigation indicates that, increase in AgO thickness leads to reduction in nonlinear refractive index

Preparation of Colloidal Silver Nanoparticles by Laser Ablation; Evaluation and Study on its Developed Applications

In this work we report the preparation of colloidal silver nanoparticles. In order to prepare the silver nanoparticles laser ablation method has been used.A silver coin as a target (purity 99.9 %) was ablated by a Q-Switched Nd:YAG laser with a fluence of about 91 mJ/cm2 at a repetition rate of 10 Hz at room temperature. In order to evaluate these particles transmission electron microscopy (TEM) and spectrophotometry (from UV to NIR) have been used. The average size of prepared nanoparticles is ~ 20 nm. The importance of morphology of nanoparticles has been investigated. Developed applications of silver nanoparticles have been studied,silver nanoparticles are considered as biocompatible and low in toxicity and have good potential for biological applications. Lately silver nanoparticles have found a novel approach in different fields of medicine, biology and industry

Fabrication and Nonlinear Refractive Index Measurement of Colloidal Silver Nanoparticles

In this paper we report the measurement of nonlinear refractive index of colloidal Ag nanoparticles and fabrication of Ag nanoparticles. In order to fabricate the colloidal silver nanoparticles laser ablation method has been used. A silver coin as a target (purity 99.9 %) was ablated by a Q-Switched Nd: YAG laser with a fluence of about 91 mJ/cm 2 at a repetition rate of 10 Hz at room temperature. In order to characterize these particles transmission electron microscopy (TEM) and spectrophotometry (from UV to NIR) have been used. The average size of fabricated nanoparticles is ~ 20 nm. The importance of morphology of nanoparticles has been investigated. We used the Z-scan technique to investigate the nonlinear refractive index of Ag nanoparticles. The excitation source was a CW 532nm Second harmonic Nd:YAG laser with a beam power of 55 mW. Mostly used applications of silver nanoparticles have been studied; silver nanoparticles are considered as biocompatible and low in toxicity and have good potential for biological applicatio ns. Lately silver nanoparticles have found a novel approach in different fields of medicine, biology and industry. In this paper n 2 refers to nonlinear refractive index , Δ T p-v is the difference between the normalized peak and the valley transmittan ce. s is the aperture linear transmittance. L eff is the effective thickne ss of the sample. EIS, SPR, TEM and SEM refer to: electrical impedance spectroscopy, surface plasmon resonance, transmission electron microscope and scanning electron microscope, respectively