Laser Chemistry最新文献_第3页

Spectroscopic techniques applied to the study of Italian painted Neolithic Potteries 光谱技术在意大利新石器时代彩绘陶器研究中的应用

Laser Chemistry Pub Date : 2006-12-25 DOI: 10.1155/2006/61607

L. Angeli, C. Arias, G. Cristoforetti, C. Fabbri, S. Legnaioli, V. Palleschi, G. Radi, A. Salvetti, E. Tognoni

引用次数: 11

Laser Cleaning and Spectroscopy: A Synergistic Approach in the Conservation of a Modern Painting 激光清洗和光谱学:现代绘画保护的协同方法

Laser Chemistry Pub Date : 2006-12-25 DOI: 10.1155/2006/42709

K. Melessanaki, C. Stringari, C. Fotakis, D. Anglos

引用次数: 16

Automatic Identification of Artistic Pigments by Raman Spectroscopy Using Fuzzy Logic and Principal Component Analysis 基于模糊逻辑和主成分分析的拉曼光谱艺术颜料自动识别

Laser Chemistry Pub Date : 2006-12-25 DOI: 10.1155/2006/18792

M. Castanys, M. Soneira, R. Pérez-Pueyo

引用次数: 10

Optical Coherence Tomography for Examination of Parchment Degradation 用于羊皮纸退化检测的光学相干断层扫描

Laser Chemistry Pub Date : 2006-11-22 DOI: 10.1155/2006/68679

M. Gora, M. Pircher, E. Götzinger, T. Bajraszewski, M. Strlič, J. Kolar, C. Hitzenberger, P. Targowski

引用次数: 24

Laser Cleaning of Easel Paintings: An Overview 架上绘画的激光清洗:概述

Laser Chemistry Pub Date : 2006-09-01 DOI: 10.1155/2006/90279

R. Bordalo, P. J. Morais, H. Gouveia, Christina Young

引用次数: 34

A Comprehensive Study for the Laser Cleaning of Corrosion Layers due to Environmental Pollution for Metal Objects of Cultural Value: Preliminary Studieson Artificially Corroded Coupons 具有文化价值的金属物品环境污染腐蚀层激光清洗的综合研究——人工腐蚀券的初步研究

Laser Chemistry Pub Date : 2006-01-30 DOI: 10.1155/2006/85324

A. Siatou, D. Charalambous, V. Argyropoulos, P. Pouli

{"title":"A Comprehensive Study for the Laser Cleaning of Corrosion Layers due to Environmental Pollution for Metal Objects of Cultural Value: Preliminary Studieson Artificially Corroded Coupons","authors":"A. Siatou, D. Charalambous, V. Argyropoulos, P. Pouli","doi":"10.1155/2006/85324","DOIUrl":"https://doi.org/10.1155/2006/85324","url":null,"abstract":"This paper is focused on the systematic investigation of the layer-by-layer removal of corrosion products on artificially corroded metal coupons aiming to introduce a \u0000methodology for the optimum laser cleaning approach of historical metal objects. Thus, it is very important to determine the chemical composition of the studied surfaces before and after irradiation. A series of laser cleaning studies has been performed on test coupons (reference and artificially corroded). Wavelength and pulse duration effects are investigated. Initial studies were focused on the use of infrared (1064 nm) and \u0000ultraviolet (355 nm and 248 nm) radiations of nanosecond (ns) pulse duration. Damage and removal threshold values were determined for the substrates and the corrosion layers, respectively. The irradiated surfaces are evaluated microscopically under the optical and the scanning electron microscope, while the mineralogical and chemical composition of the various layers is determined with X-ray diffraction and SEM-EDAX analyses, respectively. The results obtained are providing a comprehensive approach for understanding the main mechanisms that are significant in the different laser \u0000cleaning regimes, while the optimum cleaning methodologies for the \u0000studied materials are being established.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133774412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Observation of the Laser Cleaning Effect on the Gotland Sandstone Elemental Composition 激光清洗对哥特兰砂岩元素组成影响的观察

Laser Chemistry Pub Date : 2006-01-10 DOI: 10.1155/2006/84781

M. Jasińska, J. Bredal-Jørgensen, G. Śliwiński

{"title":"Observation of the Laser Cleaning Effect on the Gotland Sandstone Elemental Composition","authors":"M. Jasińska, J. Bredal-Jørgensen, G. Śliwiński","doi":"10.1155/2006/84781","DOIUrl":"https://doi.org/10.1155/2006/84781","url":null,"abstract":"Changes of the elemental composition due to laser surface cleaning of a naturally crusted historical sandstone were investigated by means of the SEM/EDX technique. Data obtained for stone samples prior to and after laser irradiation were compared with those for noncrusted, reference ones. It has been observed that the crust removal resulting from ablative cleaning was accompanied by a decrease of the partial content of elements Al, S, K, Ca, and Mg in the range of 60–80 % of their initial value recorded for the noncleaned, crust-covered stone surface. In the stone layer just under the crust coverage, a structure characterized by intergranular spaces between the SiO 2 grains being the main sandstone component filled with degraded binder was observed. From the coincidence of the binder destruction and chemical composition of the crust, the stone surface destruction due to the long-term interaction of environmental pollution was deduced. The spatial distributions of individual elements \u0000obtained by mapping after laser irradiation indicated that besides SiO 2 the content of elemental components in the sandstone surface layer decreased by 50 % , whereas for Fe with the initial content of 4 % and other surface remnants: P, Ti, Zn, and Cl—all below 1 % , insignificant changes were only revealed. It was concluded in agreement with the literature that surface cleaning by means of the 1064 nm laser does not cause removal of iron from the sandstone surface.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Hydrophobicity of water at the surface as studied by laser-induced fluorescence microscopy 用激光诱导荧光显微镜研究表面水的疏水性

Laser Chemistry Pub Date : 1998-12-01 DOI: 10.1155/1998/57838

Yaoqun Li, Shin-ya Sasaki, Takanori Inoue, T. Ogawa

引用次数: 4

Raman spectroscopy of infrared multiphoton excited molecules 红外多光子激发分子的拉曼光谱

Laser Chemistry Pub Date : 1986-06-01 DOI: 10.1155/LC.8.97

Jyhpyng Wang, Kuei-Hsien Chen, E. Mazur

引用次数: 4

Molecular Dynamics of Chemical Reactions in Solution 溶液中化学反应的分子动力学

Laser Chemistry Pub Date : 1985-08-20 DOI: 10.1155/LC.3.231

P. Bado, P. H. Berens, J. Bergsma, M. Coladonato, C. Dupuy

{"title":"Molecular Dynamics of Chemical Reactions in Solution","authors":"P. Bado, P. H. Berens, J. Bergsma, M. Coladonato, C. Dupuy","doi":"10.1155/LC.3.231","DOIUrl":"https://doi.org/10.1155/LC.3.231","url":null,"abstract":"We hope to answer one of the most fundamental and important unsolved questions \u0000in chemistry: how, from a molecular perspective, do chemical reactions in solution \u0000actually occur. The key to solving this long-standing problem is to understand the \u0000molecular dynamics, i.e., the motions of the atoms and the forces that drive them. We \u0000have already developed theoretical techniques and computational procedures involving \u0000specialized computer hardware needed to calculate the molecular dynamics for many \u0000chemical reactions in solution. From the dynamics we have derived the interface for \u0000experimental verification, namely transient electronic, infrared, and Raman spectra as \u0000well as X-ray diffraction, all of which are potentially observable manifestations of the \u0000atomic motions during the reaction. We have tested our approach on the simple \u0000inorganic I2 photodissociation and solvent caging reaction. The agreement between \u0000molecular dynamics based theory and experimental picosecond transient electronic \u0000absorption spectrum as a function of solvent, time, and wavelength is sufficiently close \u0000as to indicate that for the first time we are discovering at least part of the molecular \u0000dynamics by which a real solution chemical reaction takes place.","PeriodicalId":296295,"journal":{"name":"Laser Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125900724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11