59 results match your criteria: "Moscow State University of Technology STANKIN[Affiliation]"

The laser crater enhanced Raman scattering (LCERS) spectroscopy technique has been systematically studied for chosen sampling strategy and influence of powder material properties on spectra intensity enhancement. The same nanosecond pulsed solid state Nd:YAG laser (532 nm, 10 ns, 0.1-1.

View Article and Find Full Text PDF

A new approach combining Raman spectrometry and laser induced breakdown spectrometry (LIBS) within a single laser event was suggested. A pulsed solid state Nd:YAG laser running in double pulse mode (two frequency-doubled sequential nanosecond laser pulses with dozens microseconds delay) was used to combine two spectrometry methods within a single instrument (Raman/LIBS spectrometer). First, a low-energy laser pulse (power density far below ablation threshold) was used for Raman measurements while a second powerful laser pulse created the plasma suitable for LIBS analysis.

View Article and Find Full Text PDF

Unprecedented simultaneous enhancement in damage tolerance and fatigue resistance of zirconia/Ta composites.

Sci Rep

March 2017

Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.

Dense (>98 th%) and homogeneous ceramic/metal composites were obtained by spark plasma sintering (SPS) using ZrO and lamellar metallic powders of tantalum or niobium (20 vol.%) as starting materials. The present study has demonstrated the unique and unpredicted simultaneous enhancement in toughness and strength with very high flaw tolerance of zirconia/Ta composites.

View Article and Find Full Text PDF

Characterization of dissolved organic nitrogen in wet deposition from Lake Erhai basin by using ultrahigh resolution FT-ICR mass spectrometry.

Chemosphere

August 2016

Research Center of Lake Environment, Chinese Research Academy of Environment Sciences, Beijing, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China.

Article Synopsis
  • The study investigates the molecular characteristics of Dissolved Organic Nitrogen (DON) from wet deposition in the Erhai basin using advanced mass spectrometry techniques.
  • It identifies that about 18.3% of the wet deposition is DON, primarily consisting of single nitrogen atom species, with a typical molecular mass between 200-400 Da.
  • The findings suggest a low degree of aromaticity and humification in the samples, highlighting the effectiveness of combining multiple analytical methods for a deeper understanding of DON structure and composition.
View Article and Find Full Text PDF

Background: The tertiary system of nucleotide chain (NC) - gold nanoparticles (NPs) - carbon nanotube (CNT) represents a great interest in the modern research and application of the bio-nano-technologies. The application aspects include, for example, the development of electronic mobile diagnostic facilities, nanorobotic design for a drug delivery inside living cell, and so on. The small NC chain represents an important stage in the understanding of the interaction mechanism of a full DNA or RNA molecule with NP and CNT.

View Article and Find Full Text PDF

Antibacterial and Antifungal Activity of ZnO Containing Glasses.

PLoS One

May 2016

Department of Biomaterials and Bioinspired Materials, Materials Science Institute of Madrid, (ICMM), Spanish National Research Council (CSIC), Cantoblanco, Madrid, 28049, Spain.

A new family of non-toxic biocides based on low melting point (1250°C) transparent glasses with high content of ZnO (15-40wt%) belonging to the miscibility region of the B2O3-SiO2-Na2O-ZnO system has been developed. These glasses have shown an excellent biocide activity (logarithmic reduction >3) against Gram- (E. coli), Gram+ (S.

View Article and Find Full Text PDF

In the attempt to find valid alternatives to classic antibiotics and in view of current limitations in the efficacy of antimicrobial-coated or loaded biomaterials, this work is focused on the development of a new glass-ceramic with antibacterial performance together with safe biocompatibility. This bactericidal glass-ceramic composed of combeite and nepheline crystals in a residual glassy matrix has been obtained using an antimicrobial soda-lime glass as a precursor. Its inhibitory effects on bacterial growth and biofilm formation were proved against five biofilm-producing reference strains.

View Article and Find Full Text PDF

Mechanical performance of a biocompatible biocide soda-lime glass-ceramic.

J Mech Behav Biomed Mater

June 2014

Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Cantoblanco, 28049 Madrid, Spain. Electronic address:

A biocompatible soda-lime glass-ceramic in the SiO2-Na2O-Al2O3-CaO-B2O3 system containing combeite and nepheline as crystalline phases, has been obtained at 750°C by two different routes: (i) pressureless sintering and (ii) Spark Plasma Sintering. The SPS glass-ceramic showed a bending strength, Weibull modulus, and toughness similar values to the cortical human bone. This material had a fatigue limit slightly superior to cortical bone and at least two times higher than commercial dental glass-ceramics and dentine.

View Article and Find Full Text PDF

C(60) fullerene monolayers have been investigated by scanning tunnelling microscopy/spectroscopy. Single C(60) molecules have been resolved and a regular surface lattice structure of fullerene - in - surfactant is observed. Tunnel electron spectroscopic measurements results in typical I(V) curves which are interpreted in terms of the two-junction Coulomb blockade effect.

View Article and Find Full Text PDF