Current Nanoscience - Volume 13, Issue 1, 2017

Background: During the last few decades, increasing interest has arisen in the field of nano-machining simulations. Due to the inability of other numerical techniques to properly describe the interactions in atomistic level, Molecular Dynamics method was shown to be capable of producing sufficiently accurate results and represent the mechanisms of nano-cutting. Significant progress has been noted since the first MD studi Read More

Background: The material removal in ultra precision machining is often at the nanometre scale with stringent form and surface finish accuracy. Currently, it is very difficult to observe nanometric phenomena through experiments, but the MD method has proved helpful in this respect. Many current MD simulation studies on nanometric cutting have been focused on single cutting pass or simple line-type groove. In practice, m Read More

Background: The atomic surface roughness is very important in assessing the quality of high performance nano surfaces, in ultra-precision machining, and in silicon fabrication. The surface roughness of nano devices will invariably affect their quality and performance, so its understanding is very crucial. In this study, multi-pass nanometric atomistic simulations were employed in the characterization of this pa Read More

Background: The so-called orthogonal cutting process constitutes a well-defined and transparent example of machining. Modern applications require an understanding of the defect formation processes occurring in nano-manufacturing. Methods: Molecular-dynamics simulation is employed to study the cutting of metals by a rigid tool made of C atoms. Fe, Al and Ti are selected as examples of bcc, fcc and hcp metals. We cho Read More

Background: Unlike the traditional crystalline metals, metallic glasses are lack of longrange order and have short-range order. Metallic glasses as amorphous alloys have excellent physical, chemical and mechanical properties, and have a broad application prospects in military, aerospace and sports equipment due to their unique microstructure. Currently, machining has been considered as a promising method to obtain MGs c Read More

Background: The widespread application of nanotechnology in the last decades, the increasing likelihood of human exposure to nano-sized materials, together with the still limited knowledge concerning their toxicological profile, require a careful risk assessment, particularly in occupational settings. However, a specific “risk assessment paradigm” for these peculiar xenobiotics has not yet been defined. Objectiv Read More

Background: The DNA tetraplex (TE) nanomotor is a new nanomotor family constructed through self-assembly of guanine-rich (G-rich) single strand DNA and produces controlled motion at the molecular scale. Objective and Method: In this study, the TE conformation stability of single strand 15-mer G-rich DNA, GGTTGGTGTGGTTGG, was studied in atomic scale using molecular dynamics simulation method for the aim of potential Read More

Background: Until now various structures of photoanode are made by incorporating graphene in the photoanode structure and applying them in DSSCs. Literature review indicates that despite the considerable researches which are performed on the application of TiO2/Graphene nanocomposites in DSSCs, there is still no prevailing acceptable explanation for origin of the better performance by graphene. Methods: Read More

Background: The electrochemical determination of nicotine was investigated at the poly (alizarin red S) modified graphene/screen printed carbon electrode (poly (ARS)-GR/SPCE). The peak value of nicotine at poly (ARS)-GR/SPCE was increased comparing with the unmodified GR/SPCE, suggesting that the disposable GR/SPCE was efficiently modified by poly (ARS) to fabricate the good working area. Characterization of th Read More

Background: To realize the high performance of direct methanol fuel cells (DMFCs), controlled construction of well-dispersed Pt-based bimetallic nanoparticles either of free standing or supported on carbon-based materials is highly sought. This work demonstrates the feasibility of reduced graphene oxide (RGO)-supported Pt-Pd bimetallic nanodendrites as electrocatalysts for enhanced methanol oxidation. Methods: RGO-su Read More

Background: TiO2 photocatalysts are well-known for variety of applications in a range of important technological areas. The main drawback associated with TiO2 photocatalysts is the use of these particles in presence of UV light for practical applications and hence these particles utilizes very less part of sunlight. The purpose of this work is to introduce new energy levels between the conduction band and valence band, w Read More

Background: The recent progress in photocatalytic oxidation technique is concentrated on developing new photocatalytic materials. Photocatalytic activity of strontium titanates depends on the phase composition and structure of these materials. Recently, the authors also reported the enhanced photocatalytic activity of SrTiO3 after loading on a HZSM-5 zeolite. Methods: The raw NaZSM-5 powders were treated in hydr Read More