Results 61 to 70 of about 69,723 (263)

Optical Breakdown in Gases Induced by High-power IR CO2 Laser Pulses [PDF]

open access: yes, 2013
This chapter reviews some fundamentals of laser-induced breakdown spectroscopy (LIBS) and describes some experimental studies developed in our laboratory on gases such as nitrogen, oxygen and air.
Camacho, J. J.   +4 more
core  

Laser-induced breakdown spectroscopy of trisilane using infrared C O2 laser pulses [PDF]

open access: yes, 2013
The plasma produced in trisilane (Si3 H8) at room temperature and pressures ranging from 50 to 103 Pa by laser-induced breakdown (LIB) has been investigated.
Camacho, J. J.   +3 more
core   +2 more sources

Germanane Quantum Dots Promote Metabolic Reprogramming of Immune Cells Toward Regulatory T Cells and Suppress Inflammation In Vitro and In Vivo

open access: yesAdvanced Functional Materials, EarlyView.
Metabolic changes in immune cells direct the phenotype and function of the host immune system. Smart nanomaterials must target metabolic pathways to direct immune cell fate. This study reports the fabrication and first application of germanane quantum dots (GeHQDs) to modulate inflammation in vitro and in vivo.
Abhay Srivastava   +7 more
wiley   +1 more source

Ceramic Particle‐Reinforced Medium‐Entropy Alloys With Outstanding Mechanical Properties Prepared by Novel Micro‐LPBF

open access: yesAdvanced Functional Materials, EarlyView.
An innovative medium entropy alloy (MEA) composite material was fabricated via micro laser powder bed fusion (μ‐LPBF) with appropriate nano‐ceramic particles doping and exhibited markedly improved overall performance, including synergistically enhanced strength and ductility, increased hardness and compressive strength, improved wear resistance and ...
Zhonglin Shen, Mingwang Fu
wiley   +1 more source

Laser-Induced Breakdown Spectroscopy & Enrichment by Chelation

open access: yesProcedia Engineering, 2012
AbstractLIBS is used for fast, multi-component analysis of element compositions, but it is not very suitable for liquids. Moreover the sensitivity for metal ions is often insufficient. A fast and sensitive detection tool for metal ions in food matrices, including aqueous solutions, is developed. The principle of operation of LIBS is that a small amount
Roosma, J.R., Veen, J.J.F. van
openaire   +2 more sources

Exploring Spectral Uncertainty on the Surface of Brass Samples by Laser-Induced Breakdown Spectroscopy

open access: yesChemosensors
The shot-to-shot measurement uncertainty restricts the application of laser-induced breakdown spectroscopy (LIBS) technically, to a certain extent. In order to further deepen the understanding of spectral stability, in this paper, the effects of the ...
Wei Wang, Lanxiang Sun, Faquan Li
doaj   +1 more source

Quantitative Classification of Quartz by Laser Induced Breakdown Spectroscopy in Conjunction with Discriminant Function Analysis

open access: yesJournal of Spectroscopy, 2016
A responsive laser induced breakdown spectroscopic system was developed and improved for utilizing it as a sensor for the classification of quartz samples on the basis of trace elements present in the acquired samples.
A. Ali   +4 more
doaj   +1 more source

Quantitative Determination of Cd in Soil Using Laser-Induced Breakdown Spectroscopy in Air and Ar Conditions

open access: yesMolecules, 2018
Rapid detection of Cd content in soil is beneficial to the prevention of soil heavy metal pollution. In this study, we aimed at exploring the rapid quantitative detection ability of laser- induced breakdown spectroscopy (LIBS) under the conditions of air
Xiaodan Liu   +5 more
doaj   +1 more source

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

open access: yesAdvanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert   +14 more
wiley   +1 more source

Laser Spectroscopic Sensors for the Development of Anthropomorphic Robot Sensitivity

open access: yesSensors, 2018
The development of underwater robotics sensitivity, which is based on the sensors of laser spectroscopy methods, have been discussed. The ways to improve Laser Induced Fluorescence (LIF) and Laser Induced Breakdown Spectroscopy (LIBS) methods were ...
Oleg Bukin   +6 more
doaj   +1 more source

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