LIBS
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El documento describe la técnica de espectroscopía de emisión atómica inducida por láser (LIBS) para el análisis químico de muestras sólidas. LIBS permite el análisis simultáneo de múltiples elementos con poca o ninguna preparación de muestras y puede usarse para análisis remotos y en línea. El documento también discute los instrumentos LIBS portátiles y de laboratorio y sus aplicaciones para el análisis cuantitativo y cualitativo de muestras incluyendo pinturas
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Dye-sensitized solar cells (DSSCs) convert sunlight to electricity via a photosensitizer dye attached to a semiconductor (typically titanium dioxide). When light is absorbed by the dye, electrons are injected into the semiconductor and collected at the anode. The dye is regenerated by accepting electrons from an electrolyte solution, and the process continues. Michael Gratzel invented the DSSC in 1991. DSSCs can be made flexible and are less expensive than silicon solar cells. Ruthenium-based dyes like N719 are most commonly used but research seeks replacements like organic or natural dyes.
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The document summarizes industrial applications of laser-induced breakdown spectroscopy (LIBS). It discusses how LIBS has been used for metals and alloys processing like slag analysis, liquid steel analysis, and identification of pipe fittings by reducing analysis times by 40-50% compared to other techniques like XRF spectroscopy and spark OES. It also lists applications in scrap material sorting and recycling like segregating brominated and non-brominated plastics and sorting metal alloys and technical glasses by composition. The presentation concludes that LIBS is rapid, accurate, and reliable for these industrial analyses.
Laser produced plasmas ppt
This document discusses laser produced plasmas. It defines plasma as a quasi-neutral gas that exhibits collective behavior and comprises most of the visible universe. Plasma can be formed by applying enough energy, such as from electromagnetic fields, to tear electrons from neutral atoms. Laser produced plasmas are generated by focusing high intensity laser pulses on solid targets. Typical laser produced plasmas have temperature, density, and expansion velocity profiles that depend on the laser parameters. Applications of laser produced plasmas include use in medicine, as x-ray sources, and probing radiation biology with characteristic x-rays.
Laser & Its Application
The document summarizes the history and science behind lasers. It discusses how the laser was first conceived in the 1950s and built in 1960. It then explains the basic components of a laser including an energy input source and a gain medium that produces stimulated emission when pumped with energy. Examples of common laser types and materials are provided. Applications of lasers in spectroscopy, surgery, and distance measurements to the moon are also mentioned.
Laser ppt
Lasers emit light that is highly directional, monochromatic, and coherent. Common laser components include an active medium, excitation mechanism, and high and partially reflective mirrors. Lasing occurs when atoms in the active medium are excited and stimulated emission produces photons. Laser output is measured in watts, joules, irradiance, and pulsed vs. continuous wave. Laser hazards include eye, skin, chemical, electrical, and fire risks. Lasers are classified based on wavelength, average power, energy per pulse, and beam exposure to determine appropriate safety controls.
Laser spectroscopy
Laser spectroscopy is a technique that uses lasers as light sources for spectroscopy. It has various applications in analytical chemistry, medicine, environmental monitoring, and industrial processes. Some key laser spectroscopy techniques described in the document are laser-induced breakdown spectroscopy (LIBS), laser-induced fluorescence spectroscopy (LIFS), laser ablation inductively coupled plasma optical emission spectroscopy (LA-ICP-OES), and Raman spectroscopy. These techniques can be used for applications such as tissue analysis, breath analysis, combustion engine monitoring, and identification of bacterial contamination. In summary, laser spectroscopy is a versatile analytical technique that utilizes lasers and spectroscopy for chemical analysis and monitoring across many different fields.
Atomic emission spectroscopy
Atomic emission spectroscopy is a standard method for metal analysis where a sample is vaporized to form free atoms that are excited to higher energy states. When the atoms return to lower states, they emit photons of radiation. Modern instruments use non-combustion plasma sources like inductively coupled plasma. An atomic emission spectrometer consists of a sample atomizer, monochromator, and detector. The sample is vaporized and excited, then the emitted light is dispersed and measured to identify elemental composition. Atomic emission spectroscopy is used for applications like pharmaceutical and metals analysis, and determining mineral composition in materials.
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LIBS
- 1. Espectroscopía de descomposición inducida por láser, LIBS Jesús Anzano Lacarte Laboratorio Láser Universidad de Zaragoza
- 4. Espectroscopía de Emisión Atómica
- 8. Clasificación de los tipos de plasma
- 9. Muestra HAZ LÁSER (pulsado y focalizado) reflexión Introducción
- 10. absorción Muestra HAZ LÁSER (pulsado y focalizado) reflexión Introducción
- 11. absorción Muestra HAZ LÁSER (pulsado y focalizado) fragmentación fusión sublimación atomización absorción Introducción
- 12. Muestra HAZ LÁSER (pulsado y focalizado) plasma electrones iones átomos moléculas partículas sólidas absorción Introducción
- 16. Mínima o nula preparación de la muestra No se precisa el empleo de reactivos químicos Análisis simultaneo de varios elementos Rapidez Fácilmente automatizable Resolución espacial Análisis remoto Costosa instrumentación Dificultad para encontrar patrones Valores altos de %RSD Efecto matriz Introducción VENTAJAS Y DESVENTAJAS
- 17. Muestra Introducción INSTRUMENTACIÓN LIBS LÁSER Portamuestras Selector espectral Detector Plasma Unidad de control, almacenamiento y procesado de datos Trigger generador de retrasos
- 18. 1.Sistema μ -LIBS Instrumentación μ -LIBS
- 19. Láser Espejos dicroicos ICCD Lente Colectora Espectrógrafo Echelle 2.LIBS Instrumentación μ -LIBS
- 20. INSTRUMENTACIÓN Muestra 10 m LÁSER Telescopio Newton Expansor de haz Espectrómetro 1.- EXCITACIÓN DEL ANALITO Tele LIBS .- Experimental
- 21. INSTRUMENTACIÓN Plasma 10 m LÁSER Telescopio Newton Expansor de haz Espectrómetro 2.- CAPTACIÓN DE LA SEÑAL DEL PLASMA Tele LIBS .- Experimental
- 23. Fundamentos de la red de difracción
- 25. Redes Echelle
- 28. iSTAR
- 30. Secuencia de lectura de un CCD
- 36. Plasma Imaging Alloy Paint Soil
- 37. LIBS - Configuración óptica
- 38. Detección óptima Rocas de fosfatos
- 40. Porta LIBS
- 42. Desarrollo temporal del plasma del plomo
- 43. Temporal Development of the Lead Lines
- 44. Temperature Map of the LIB Lead Plasma ( ( Temperature (K) Height (mm) Delay Time (ns)
- 45. Temperature in a LIB Plasma
- 46. Análisis cuantitativo Pb en pinturas