Ultraviolet and Visible Spectroscopy

Gauglitz, G.

doi:10.1002/9783527618323.ch16

Cited by 4 publications

(11 citation statements)

References 113 publications

(12 reference statements)

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“…When dealing with measurements on opaque materials, different parameters play an important role in the definition of the spectral features [3,31]. The reflected radiation from a generic surface, or a paint layer, that can be considered as a multicomponent polycrystalline assemblage, is generally called "total reflectance" (R T ), which is the sum of the specular (or surface, R S ), diffuse superficial (R DS ), retro-diffused (R RD ), and diffuse (or volume, R V ) reflectance (Figure 1).…”

Section: Principles and Theorymentioning

confidence: 99%

“…The basic optical configuration for a spectrometer working in the UV-Vis region includes one or more polychromatic light sources, one or two wavelength selectors for splitting the radiation into its different components (wavelengths), and one or more detectors for measuring the radiation that interacts with the sample [3,39,40]. Depending on the type of instrumentation, an internal or external sample holder can also be present.…”

Section: Instrumentation Accessories and Measurement Modalitiesmentioning

confidence: 99%

“…UV-Vis spectroscopy is related to excitation of the outermost electrons of the atoms, which are involved in the formation of molecules, and is, therefore, often referred to as "electronic spectroscopy" [3]. Measurements in the UV-Vis region are usually performed in transmittance, reflectance and photoluminescence (fluorescence and phosphorescence) modes.…”

Section: Introductionmentioning

confidence: 99%

“…In the art conservation field this spectroscopic technique, unlike the most traditional applications of UV-Vis spectroscopy [3], is mainly applied in situ by using portable devices and employing non-invasive methodologies. The studied artworks have, excluding a few cases such as glass items and stained glass windows, an opaque appearance that force them to be measured in reflectance mode.…”

Section: Introductionmentioning

confidence: 99%

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UV-Vis spectroscopy

Picollo

Aceto

Vitorino

2018

Physical Sciences Reviews

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Abstract UV-Vis reflectance spectroscopy has been widely used as a non-invasive method for the study of cultural heritage materials for several decades. In particular, FORS, introduced in the 1980s, allows to acquire hundreds of reflectance spectra in situ in a short time, contributing to the identification of artist’s materials. More recently, microspectrofluorimetry has also been proposed as a powerful non-invasive method for the identification of dyes and lake pigments that provides high sensitivity and selectivity. In this chapter, the concepts behind these spectroscopic methodologies will be discussed, as well as the instrumentation and measurement modes used. Case studies related with different cultural heritage materials (paintings and manuscripts, textiles, carpets and tapestries, glass, metals, and minerals), which show the usefulness of UV-Vis reflectance spectroscopy and microspectrofluorimetry applied to the study of artworks, will also be presented.

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Section: Principles and Theorymentioning

confidence: 99%

Section: Instrumentation Accessories and Measurement Modalitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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UV-Vis spectroscopy

Picollo

Aceto

Vitorino

2018

Physical Sciences Reviews

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“…UV measurement technique is widely used to determine concentration of a compound in the solution, as well as to provide information about molecular structure and functional groups. 213 The principle of this analysis is based on the fact that electrons could be excited by absorbing electromagnetic radiation at wavelength in the UV-visible region (100-400 nm).…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Controlled synthesis of layered double hydroxide compounds with novel morphologies for biological applications

Gunawan¹

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Chapter 1 Introduction and the Scope of Thesis Chapter 2 Literature Review 2.1 Materials Developments as Carriers of Bioactive Molecules Introduction 5 2.2 Introduction on Layered Double Hydroxides 2.2.1 Structural Properties of Layered Double Hydroxides (LDHs) 2.2.2 Metal composition of hydroxide layers 2.2.3 Nature of interlayer anions 2.2.4 Water content in LDHs 2.3 Synthesis Methods of LDHs 2.3.1 Co-precipitation method 2.3.2 Hydrothermal treatment 2.3.3 Anion exchange method 2.3.4 Reconstruction method 2.3.5 Sol-gel method 2.3.6 Recent advancement in modified synthesis of LDHs with novel Properties 2.3.6.1 Synthesis of LDHs with different morphologies 2.3.6.2 Polymer encapsulated LDHs 2.3.6.3 LDHs with luminescence properties 2.4 Development of Layered Double Hydroxides for Pharmaceutical Applications 2.4.1 LDHs as stabilizers and protecting agents 2.4.2 LDHs for controlled drug release 2.4.3 LDHs for cellular delivery 2.5 Advantages of Layered Double Hydroxides as Drug Carriers ii

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