Xueshi Bai

Xueshi Bai
Centre de recherche et de restauration des musées de France

Doctor of Philosophy

About

45
Publications
9,263
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
910
Citations
Citations since 2017
21 Research Items
533 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
November 2011 - December 2014
Claude Bernard University Lyon 1
Position
  • PhD Student

Publications

Publications (45)
Article
Full-text available
The detailed study of phase transition processes among various calcium sulfates is still insufficient in spite of its importance in artificial and natural processes. Here, the phase transformation γ-CaSO4 → β-CaSO4 → CaO is induced by electron beam irradiation and directly observed inside the transmission electron microscope (TEM). Relying on the r...
Article
Full-text available
Curators have developed preventive conservation strategies and usually try to control the temperature (T) and relative humidity (RH) variations in the museum rooms to stabilise the artworks. The control systems chosen by museums depend on the size and age of the building, the financial means and the strategies that can be adapted. However, there is...
Article
The carbon content distribution of ferrous archaeological artefacts in a quantitative way allows us to understand the nature of the materials. Our previous works have ever proved that the use of laser-induced breakdown spectroscopy (LIBS) could be an efficient method to solve problems of in situ analysis and offer a high spatial resolution. To asse...
Article
Laser-induced breakdown spectroscopy (LIBS) is a versatile elemental analytical technique whose basic elements were described as early as 1962, shortly after the invention of a pulsed laser. Since that time, LIBS has been applied for elemental characterization of various applications. In this work, we review the evolution of LIBS characterization o...
Article
Full-text available
In consequence of the flooding of the Loing river in 2016, some of the storage areas for the Musée Girodet were submerged, with 3000 artworks affected. Following this, the painting Le Jeune Trioson (nineteenth century, attributed to the school of Anne-Louis Girodet De Roucy Trioson) developed severe blanching in the varnish, over the dark backgroun...
Article
The presence of carbon content is a key enabling factor in archaeological ferrous material studies because it can provide technological and temporal information on its fabrication. A strong relationship exists between the composition, the metallographic structure, and the mechanical properties of metals. Laser-induced breakdown spectroscopy (LIBS)...
Preprint
The influence of ns-laser wavelength to discriminate ancient painting techniques such as are fresco, casein, animal glue, egg yolk and oil was investigated in this work. This study was carried out with a single shot laser on samples covered by a layer made of a mixture of the cinnabar pigment and different binders. Three wavelengths based on Nd: YA...
Article
In this study, we provide a new application of laser-induced breakdown spectroscopy (LIBS) to evaluate whether ancient bones contain sufficient organic material before radiocarbon dating, which can avoid a complex preliminary analysis of the samples or unnecessary sampling. We examined, as the first step, the plasma induced by a UV (266 nm) ns-lase...
Article
Full-text available
Terahertz time-domain imaging (THz-TDI) and spectral-domain optical coherence tomography (SD-OCT) are two techniques capable of providing 3D datasets from which depth profiles and cross-sectional images of an object can be derived. They are novel photonics technologies of particular relevance to the field of heritage science, for which the comprehe...
Article
Après avoir connu un essor sans précédent pour les applications biomédicales dès 1991, la tomographie en cohérence optique (OCT) s’est étendue à différentes disciplines d’étude des matériaux. Parmi les plus intéressantes on peut aujourd’hui y ajouter l'histoire de l'art technique et matériel, la conservation et la restauration d'objets du patrimoin...
Article
The aim of this research project was the development of a hybrid system in laboratory coupling together three analytical techniques, namely laser-induced breakdown spectroscopy (LIBS), laser-induced fluorescence (LIF) and Raman spectroscopy in a single instrument. The rationale for combining these three spectroscopies was to identify a material (mo...
Article
The influence of ns-laser wavelength to discriminate ancient painting techniques such as are fresco, casein, animal glue, egg yolk and oil was investigated in this work. This study was carried out with a single shot laser on samples covered by a layer made of a mixture of the cinnabar pigment and different binders. Three wavelengths based on Nd: YA...
Article
Full-text available
In laser-induced breakdown spectroscopy (LIBS), ablation takes place in general in an ambient gas of the atmospheric pressure, often in air but also in noble gas such as argon or helium. The use of noble gas is known to significantly improve the performance of the technique. We investigate in this work the morphology and the characteristics of indu...
Article
Optical emissions from the major and trace elements embodied in a transparent gel prepared from cooking oil were detected after the gel was spread in a thin film on a metallic substrate. Such emissions are due to the indirect breakdown of the coating layer. The generated plasma, a mixture of substances from the substrate, the layer, and the ambient...
Article
Full-text available
Laser-induced breakdown spectroscopy (LIBS) has been invented for more than 50 years, which analyzes the spectrum of the laser-induced plasma to determine the elemental composition of the ablated sample. Recently, LIBS technique has been well developed and applied in different domains, for example oceanic exploration, pollution monitoring in the en...
Article
Full-text available
Measurements with laser-induced breakdown spectroscopy (LIBS) usually take place in the atmospheric air. For quantitative analysis of metallic elements, oxidation may represent an important issue which can significantly modify the stoichiometry of the plasma. Molecule formation in plasma should be therefore studied and taken into account in the LIB...
Article
We have investigated the structure and the dynamics of the plasma induced on a metallic target in 1-atm argon ambient by a nanosecond laser pulse with irradiance in the range of 10 GW/cm2. The structure is revealed to be sensitively dependent on the laser wavelength. A layered structure of different species characterizes the plasma induced by ultra...
Article
Full-text available
We describe a setup for LIBS mapping of nanoparticles and trace metallic elements in biological organ as well as the followed experimental procedure. Mapping was performed for metallic elements such as Gd, Si, Ca and Fe, with a resolution of 100 mu m on kidney slices sampled from a mouse 24 h after intravenous injection of a solution of gadolinium-...
Article
Full-text available
Influence of laser fluence and pulse duration on the morphology and the internal structure of plasma induced by infrared nanosecond laser pulse on an aluminum target placed in an argon ambient gas of one atmosphere pressure was experimentally studied. Dual-wavelength differential spectroscopic imaging was used in the experiment, which allowed obser...
Article
Full-text available
Optical emissions from major and trace elements embodied in a transparent gel prepared from cooking oil were detected when the gel was spread in thin film on a metallic substrate and a plasma was induced on the substrate surface using nanosecond infrared pulsed laser. Such emissions are due to indirect breakdown of the coating layer. The generated...
Article
Full-text available
We studied the behavior of the plasma induced by a nanosecond infrared (1064 nm) laser pulse on a metallic target (Al) during its propagation into argon ambient gas at the atmospheric pressure and especially over the delay interval ranging from several hundred nanoseconds to several microseconds. In such interval, the plasma is particularly interes...
Article
Laser-induced plasma represents today a widespread spectroscopic emission source. It can be easily generated using compact and reliable nanosecond pulsed laser on a large variety of materials. Its application for spectrochemical analysis for example with laser-induced breakdown spectroscopy (LIBS) has become so popular that one tends to forget the...
Article
Emission spectroscopy of laser-induced plasma from a thin section of mouse kidney successfully detected inorganic elements, Na, Ca, Cu, and Gd, naturally contained in the organ or artificially injected in the form of Gd-based nanoparticle. A two-dimensional scan of the sample allowed the laser beam to explore its surface with a resolution of 100 μm...
Article
Distribution of molecular species, C2 and CN, in laser-induced plasma from a polymer target (polyvinyl chloride: PVC) was observed for ablation with 266 nm and 355 nm pulses. The influence of ablation photon energy on the distribution of molecular species in the plasma has been thus studied. Time- and space-resolved emission spectroscopy was used f...
Article
Full-text available
Laser-induced plasma is today a widespread spectroscopic emission source. It can be easily generated using compact and reliable nanosecond pulsed lasers and finds applications in various domains with laser-induced breakdown spectroscopy (LIBS). It is however such a particular medium which is intrinsically a transient and non-point light emitting so...
Article
Laser-induced plasma from an aluminum target in one-atmosphere argon background has been investigated with ablation using nanosecond ultraviolet (UV: 355 nm) or infrared (IR: 1064 nm) laser pulses. Time- and space-resolved emission spectroscopy was used as a diagnostics tool to have access to the plasma parameters during its propagation into the ba...
Article
Full-text available
Mineral elements contained in commercially available milk powders, including seven infant formulae and one adult milk, were analyzed with inductively coupled plasma atomic emission spectrometry (ICP-AES) and laser-induced breakdown spectroscopy (LIBS). The purpose of this work was, through a direct comparison of the analytical results, to provide a...
Article
Laser ablation in background gas implies supplementary complexities with respect to what happens in the vacuum. It is however essential to understand in detail the involved mechanisms for a number of applications requiring the ablation to be performed in an ambient gas at relative high pressure, such as pulsed-laser deposition, or laser-induced bre...
Article
The molecular wake-assisted interaction between two collinear femotosecond laser pulses is investigated in air, which leads to the generation of a controllable 1.8 mJ super-continuum pulse with an elongated self-guided channel due to the cross-phase modulation of the impulsively aligned diatomic molecules in air. For two parallel launched femtoseco...
Article
We demonstrate controllable generation of a high-energy supercontinuum pulse of 1.8 mJ through femtosecond filamentation in prealigned diatomic molecules in air. For high-energy femtosecond laser pulses of linear polarization, the focusing condition is loosened by the cross-defocusing effect from the perpendicularly orientated molecules, which prom...
Article
We report that intense ultrafast light can be particlelike kicked through the rotational Raman wake of the impulsively pre-excited diatomic molecules in atmosphere, manifested by controllable repulsion and attraction of intense pulses delayed by molecular alignment revival periods, and by mutual fusion of orthogonally polarized intense pulses nearb...
Article
We present an approach to explore and control nonlinear interactions between two orthogonally polarized femtosecond filaments launched parallel in air. The self-phase and cross-phase modulations due to the Kerr effect and cross-(de)focusing induced by the plasma and molecular alignment were distinctly identified resulting in attraction and repulsio...
Article
We study the influence of the molecular alignment on the plasma channel length of femtosecond filament at 800 nm in air. The filament length is observed to be nearly doubled when the high-energy femtosecond laser pulse is properly tuned to match the perpendicular revivals of the molecular alignment, which is different from the low-energy femtosecon...

Network

Cited By

Projects

Projects (2)
Project
Access and Sharing of high technology infrastructures. Non destructive testing. Development and optimisation of techniques for Cultural Heritage research.
Project
Innovative instruments and methods for integrated approaches to CH analysis and diagnostics Task 6.2 Advanced mobile instruments for coupling point analytical and imaging methods: ‐Mobile LIF‐Raman‐LIBS instrumentation