Effect of Substrate Temperature on the Structural, Optical and Electrical Properties of DC Magnetron Sputtered VO Thin Films.

This study focuses on the effect of the substrate temperature () on the quality of VO thin films prepared by DC magnetron sputtering. was varied from 350 to 600 °C and the effects on the surface morphology, microstructure, optical and electrical properties of the films were investigated. The results show that below 500 °C favors the growth of VO phase, whereas higher (≥500 °C) facilitates the formation of the VO phase.

The effect of comfort care based on the collaborative care model on the compliance and self-care ability of patients with coronary heart disease.

Background: Coronary heart disease (CHD) causes mental discomfort in patients, so there is a pressing need to strengthen the nursing cooperation with patients during treatment, which can help patients to regulate their psychological status, promoting successful rehabilitation. This study was to explore the effect of comfort care based on the collaborative care model (CCM) on the compliance and self-care ability of patients with CHD.

Methods: A total of 104 CHD patients were randomly selected in our hospital between April 2019 and April 2020.

Erratum: Zhang, C. et al., The Effect of Substrate Biasing during DC Magnetron Sputtering on the Quality of VO Thin Films and Their Insulator-Metal Transition Behavior. 2019, , 2160.

The authors would like to correct a typographical error in their paper [...

Diamond Deposition on Iron and Steel Substrates: A Review.

This article presents an overview of the research in chemical vapor deposition (CVD) diamond films on steel substrates. Since the steels are the most commonly used and cost-effective structural materials in modern industry, CVD coating diamond films on steel substrates are extremely important, combining the unique surface properties of diamond with the superior toughness and strength of the core steel substrates, and will open up many new applications in the industry. However, CVD diamond deposition on steel substrates continues to be a persistent problem.

The Effect of Substrate Biasing during DC Magnetron Sputtering on the Quality of VO Thin Films and Their Insulator-Metal Transition Behavior.

In this work, VO thin films were deposited on Si wafers (onto (100) surface) by DC magnetron sputtering under different cathode bias voltages. The effects of substrate biasing on the structural and optical properties were investigated. The results show that the metal-insulator transition (MIT) temperature of VO thin films can be increased up to 14 K by applying a cathode bias voltage, compared to deposition conditions without any bias.

Hard CrO coatings on SS316L substrates prepared by reactive magnetron sputtering technique: a potential candidate for orthopedic implants.

316L stainless steel (SS) implants suffer from tribological and biocompatibility problems which limit their service lifetime. In order to improve the surface properties of 316L SS for orthopedic implant applications, hard chromium oxide coatings were applied on 316L SS substrates using a reactive magnetron sputtering technique. The morphological, structural, and phase compositional analyses were conducted on the deposited coatings by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy.

Synthesis and Characterization of Nanodiamond Reinforced Chitosan for Bone Tissue Engineering.

Multifunctional tissue scaffold material nanodiamond (ND)/chitosan (CS) composites with different diamond concentrations from 1 wt % to 5 wt % were synthesized through a solution casting method. The microstructure and mechanical properties of the composites were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and nanoindentation. Compared with pristine CS, the addition of ND resulted in a significant improvement of mechanical properties, including a 239%, 276%, 321%, 333%, and 343% increase in Young's modulus and a 68%, 96%, 114%, 118%, and 127% increase in hardness when the ND amount was 1 wt %, 2 wt %, 3 wt %, 4 wt %, and 5 wt %, respectively.

Electrical Characteristics of Horizontally and Vertically Oriented Few-Layer Graphene on Si-Based Dielectrics.

Horizontally and vertically oriented few-layer graphenes have been synthesized directly on SiO2 coated Si substrates via thermal and hot-filament chemical vapor deposition, respectively. The effect of the direction of mass flow on the fabrication of graphene film is analysed and a plausible mechanism is proposed. The graphene/p-Si heterojunction is fabricated and tested for its potential in optoelectronic devices.

Effect of Nanoparticle Incorporation and Surface Coating on Mechanical Properties of Bone Scaffolds: A Brief Review.

Mechanical properties of a scaffold play an important role in its in vivo performance in bone tissue engineering, due to the fact that implanted scaffolds are typically subjected to stress including compression, tension, torsion, and shearing. Unfortunately, not all the materials used to fabricate scaffolds are strong enough to mimic native bones. Extensive research has been conducted in order to increase scaffold strength and mechanical performance by incorporating nanoparticles and/or coatings.

Chemical Vapor Deposited Few-Layer Graphene as an Electron Field Emitter.

Chemical vapor deposition (CVD) growth of graphene on polycrystalline copper (Cu) foil in a low pressure conditions has been presented, aiming to achieve the highest quality with large-scale fabrications, which requires comprehensive understanding and effective controlling of the growth process. Herein, few-layer graphene (FLG) films with large-domain sizes were grown on Cu metal catalyst substrates using a vertical mass-flow hot-filament CVD reactor, with the intention of large scale production, by optimizing the CVD system and three of the process parameters: (i) gas flow compositions, (ii) substrate annealing time and (iii) graphene deposition time. The detailed scanning electron microscope and Raman spectroscopy analysis indicate that all the above mentioned process parameters affect growth of FLG film on Cu substrate.

Fabrication of bi-layer graphene and theoretical simulation for its possible application in thin film solar cell.

High quality graphene film is fabricated using mechanical exfoliation of highly-oriented pyrolytic graphite. The graphene films on glass substrates are characterized using field-emission scanning electron microscopy, atomic force microscopy, Raman spectroscopy, UV-vis spectroscopy and Fourier transform infrared spectroscopy. A very high intensity ratio of 2D to G-band (to approximately 1.

Aqueous adsorption and removal of organic contaminants by carbon nanotubes.

Organic contaminants have become one of the most serious environmental problems, and the removal of organic contaminants (e.g., dyes, pesticides, and pharmaceuticals/drugs) and common industrial organic wastes (e.

Study on protein conformation and adsorption behaviors in nanodiamond particle-protein complexes.

In the present research, the conformation of bovine serum albumin (BSA) in the nanodiamond particle (ND)-BSA complex was studied by Fourier transform infrared spectroscopy, fluorescence spectroscopy, UV-vis spectroscopy, and circular dichroism spectroscopy. The spectroscopic study revealed that most BSA structural features could be preserved in the complex though the BSA underwent conformational changes in the complex due to ND-BSA interaction. In addition, BSA adsorption isotherms and zeta-potential measurements were employed to investigate the pH dependence of the ND-BSA interaction.

[Progress in the research of carbon nanotubes as drug carriers].

Research and development of new drug carriers are crucial to the research of drugs. Due to their unique hollow structure and nano-diameter, carbon nanotubes (CNTs) can be used as drug carriers. Functionalization of CNTs with peptides, proteins, nucleic acids or even drug molecules, the so obtained functionalized CNTs can be used as carriers to deliver bioactive molecules into cells without causing any toxicity.

Rapid microwave synthesis of chitosan modified carbon nanotube composites.

Chitosan modified multi-walled carbon nanotube composites were synthesized under microwave irradiation. The resultant chitosan modified multi-walled carbon nanotube composites were purified by twice adjusting of pH value of the solution and centrifugating in succession. The surface functional groups of chitosan modified multi-walled carbon nanotube composites are confirmed by Fourier transform infrared spectroscopy and UV-vis spectroscopy.