Listar por autor "Purohit, Pablo"
Mostrando ítems 1-20 de 24
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A multipurpose thermal vacuum chamber for planetary research compatible with stand-off laser spectroscopies
Laserna-Vázquez, José Javier
; Álvarez-Llamas, César; Purohit, Pablo; Moros-Portolés, Javier; Lucena, Patricia; Vadillo-Pérez, José Miguel[et al.] (2022)
Stand-off spectroscopies and imaging techniques have gained a proper niche within the modern tools in remote compositional analysis for exploration in-situ planetary surface using rovers. Laser-induced breakdown spectrometry ... -
A systematic evaluation on the impact of sample-related and environmental factors in the analytical performance of acoustic emission from laser-induced plasmas
Bosáková, Markéta; Purohit, Pablo; Álvarez-Llamas, César; Moros-Portolés, Javier; Novotný, Karel; Laserna-Vázquez, José Javier[et al.] (Elsevier, 2022-09-08)
Acoustics recordings from laser-induced plasmas are becoming increasingly regarded as a complementary source of information from the inspected sample. The propagation of these waves is susceptible to be modified by the ... -
Atomization efficiency and photon yield in laser-induced breakdown spectroscopy analysis of single nanoparticles in an optical trap.
Purohit, Pablo; Fortes-Román, Francisco Javier; Laserna-Vázquez, José Javier (Elsevier, 2017-02-16)
Laser-induced breakdown spectroscopy (LIBS) was employed for investigating the influence of particle size on the dissociation efficiency and the absolute production of photons per mass unit of airborne solid graphite spheres ... -
Attogram sensitivity through laser-induced breakdown spectroscopy of single optically-trapped nanoparticles
Purohit, Pablo; Laserna-Vázquez, José Javier (2017-07-10)
Current trends in nanoengineering are bringing along new structures for usage over a wide variety of fields: from readily available products, e.g., clothes or foodstuff, to next-generation electronics or drugs. To suit ... -
Chemical and acoustical mixed-mapping of geological materials from laser-induced plasmas: a comprehensive approach to differentiate mineral phases
Bosáková, Markéta; Moros-Portolés, Javier; Purohit, Pablo; Álvarez-Llamas, César; Novotný, Karel; Laserna-Vázquez, José Javier[et al.] (ACS, 2024-10)
The acoustic wave produced alongside laser-induced plasmas can be used in conjunction with the recorded atomic spectra of plasma emission to expand the physicochemical information acquired from a single inspection event. ... -
Development of a laser-based analytical platform for the LIBS inspection of individual nanoparticles within an atmospheric pressure optical trap
(UMA Editoria, 2021-02-02)En esta tesis doctoral se presenta un sensor basado en LIBS como técnica de inspección para la caracterización de nanopartículas individuales. El cuerpo de este trabajo se divide en cuatro capítulos en los que se recoge, ... -
Differentiation of closely related mineral phases in Mars atmosphere using frequency domain laser-induced plasma acoustics.
Álvarez-Llamas, César; Purohit, Pablo; Moros-Portolés, Javier; Laserna-Vázquez, José Javier (Elsevier, 2022-08-16)
The combination of data yielded by laser-induced breakdown spectroscopy (LIBS) and laser-induced plasma acoustics (LIPAc) is a topic of many prospective applications as these coexisting phenomena can cover different sample ... -
Hyperspectral LIBS imaging of single-optically trapped particles
The interaction between discrete particles with laser-induced plasma presents some complexities that directly affects the analysis of bulk aerosols by LIBS. Single-particle analysis is not exempt of this kind of phenomena ... -
LIBS and Acoustic Measurements of Rocks and Regolith Found in the Traverse of the Perseverance Rover Across the Jezero Crater, Mars
Laserna-Vázquez, José Javier; Moros-Portolés, Javier; Álvarez-Llamas, César; Purohit, Pablo; Angel, S.M.; Bernardi, P.; Bousquet, O.; Cadu, A.; Chide, B.; Clavé, E.; Clegg, S.; Dauson, E.; Forni, O.; Fouchet, T.; Gasnault, O.; Jacob, X.; Lacombe, G.; Lanza, N.L.; Larmat, C.; Lasue, J.; Lorenz, R.D.; Meslin, P. -Y.; Montmessin, F.; Murdoch, N.; Ollila, A.M.; Pilleri, P.; Reyes-Newell, A. L.; Schroder, S.; Stott, A.; Cate, J. Ten; Vogt, D.; Maurice, S.; Wiens, R.C.; Mimoun, D.[et al.] (2022)
The SuperCam instrument of the NASA MARS 2020 Perseverance rover combines a suite of atomic and molecular spectroscopies intended for an extensive description of rocks, soils and minerals in the surroundings of the landing ... -
LIBS-Acoustic Mid-Level Fusion Scheme for Mineral Differentiation under Terrestrial and Martian Atmospheric Conditions
Álvarez-Llamas, César; Purohit, Pablo; Laserna-Vázquez, José Javier (American Chemical Society, 2022-01-12)
The shockwave produced alongside the plasma during a laser-induced breakdown spectroscopy event can be recorded as an acoustic pressure wave to obtain information related to the physical traits of the inspected sample. In ... -
Mechanical traits of isolated nuclei inspected via force spectroscopy
(2022-09)The larger stiffness of the nuclei when compared to the rest of the cell imposes a key restriction to cell deformability and their capability to traverse interstices. In contrast, cancerous cells have been reported to ... -
OC-OT-LIBS: A novel approach to the chemical characterization of single particles
Spectral identification of individual micro- and nano-sized particles by the sequential intervention of optical catapulting, optical trapping and laser-induced breakdown spectroscopy is presented [1]. The three techniques ... -
Optical trapping as a morphologically selective tool for in-situ LIBS elemental characterization of single nanoparticles generated by laser ablation of bulk targets in air
Purohit, Pablo; Fortes-Román, Francisco Javier; Laserna-Vázquez, José Javier (American Chemical Society, 2021-01-05)
In the present work, authors introduce a shape-specific methodology for evaluating the full elemental composition of single micro and nanoparticles fabricated by laser ablation of bulk targets. For this purpose, bronze ... -
Polydispersity and fractionation in laser ablation studied by LIBS in an optical trap
LIBS characterization of aerosols produced by laser ablation of bulk samples is strongly influenced by variations of physicohemical properties of the elements integrating the matrix. Among the consequences of these changes ... -
Simultaneous LIBS acoustic detection for mineral differentiation. Imaging and standoff studies under terrestrial and martian atmospheric conditions
Álvarez-Llamas, César; Bosáková, Markéta; Purohit, Pablo; Moros-Portolés, Javier; Laserna-Vázquez, José Javier (2022)
The combination of data simultaneously generated by laser-induced breakdown spectroscopy (LIBS) and laser-induced acoustics (LIAc) is a topic of many potential applications as both phenomena cover different sample traits. ... -
Size-dependent synergetic seeding effects in the inspection of airborne dry nanoaerosols by LIBS.
Purohit, Pablo; Fortes-Román, Francisco Javier; Malegiannaki, I.; Jaime-Fernández, Lourdes; Laserna-Vázquez, José Javier (Elsevier, 2021-11-18)
In the present paper, confined dry Cu nanoaerosols of controlled particle size are inspected under a time-resolved LIBS scheme to explore the effect of laser-particulate matter interaction upon the detection capability of ... -
Spectral identification in the attogram regime through laser induced breakdown spectroscopy of single optically-trapped nanoparticles in air
Laserna-Vázquez, José Javier; Purohit, Pablo (2017-10-20)
Current trends in nanoengineering are bringing along new structures of diverse chemical compositions that need to be meticulously defined to ensure their correct operation. Few methods can provide the sensitivity required ... -
Spectral identification in the attogram regime through laser-induced emission of single optically-trapped nanoparticles in air.
Purohit, Pablo; Fortes-Román, Francisco Javier; Laserna-Vázquez, José Javier (Wiley-VCH, 2017-09-06)
Current trends in nanoengineering are bringing along new structures of diverse chemical compositions that need to be meticulously defined in order to ensure their correct operation. Few methods can provide the sensitivity ... -
Sub-femtogram simultaneous elemental detection in multicomponent nanomatrices using laser-induced plasma emission spectroscopy within atmospheric pressure optical traps.
Purohit, Pablo; Fortes-Román, Francisco Javier; Laserna-Vázquez, José Javier (American Chemical Society, 2019-05-10)
Simultaneous detection of multiple constituents in the characterization of state-of-the-art nanomaterials is an elusive topic to a majority of the analytical techniques covering the field of nanotechnology. Optical catapulting ...