Organic dyes extracted from plants, insects, and shellfish have been used for millennia in dyeing textiles manufacturing colorants painting. The economic push with high tinting strength, directly related to extinction coefficients the visible range, historically led selection of substances that could be at low concentrations. But a desirable property colorist is major problem analytical chemist; identification cultural heritage objects extremely difficult. Techniques routinely inorganic...

Abstract Surface‐enhanced Raman scattering (SERS) is a powerful technique for the detection of natural dyes found in archeological and historical textiles, paintings, other works art. Natural organic products historically used as textile or lake pigments are often fluorescent under normal dispersive measurement conditions. To add to fluorescence problem, amount dye actually present on art minimal, requiring extremely sensitive analytical techniques. The enhancement signal quenching...

Scientific studies of works art are usually limited by severe sampling restrictions. The identification organic colorants, a class compounds relevant for attribution and provenance studies, is further complicated the low concentrations at which these used interference protein-, gum-, or oil-binding media present in pigment glaze samples. Surface-enhanced resonance Raman scattering (SERRS) was successfully to identify natural colorants archaeological objects, polychrome sculptures, paintings...

The applicability of Raman spectroscopy and surface-enhanced scattering (SERS) to the analysis synthetic dyes commonly found in ballpoint inks was investigated a comparative study. Spectra 10 were obtained using dispersive system (633 nm, 785 nm lasers) Fourier transform (1064 laser) under different analytical conditions (e.g., powdered pigments, solutions, thin layer chromatography [TLC] spots). While high fluorescence background poor spectral quality often characterized normal spectra...

Since its introduction in the cultural heritage field, nearly 30 years ago, surface‐enhanced Raman spectroscopy (SERS) has emerged as a promising analytical technique that is particularly suitable for detection and identification of organic colorants. Its great molecular selectivity specificity, unparalleled sensitivity compared to other instrumental methods, have allowed researchers successfully characterize wide number natural dyes few synthetic ones microscopic samples from objects...

The introduction of surface-enhanced Raman spectroscopy (SERS) in the field cultural heritage has significantly improved analysis organic dyes and their complexes that have been used as textile pigments paintings other polychrome works art since antiquity. Over last five years, a number different procedures developed by various research groups. In this Article, we evaluate effect pretreating samples exposing them to hydrofluoric acid (HF) vapor prior SERS analysis, step designed hydrolyze...

Abstract The Raman and surface‐enhanced spectra (SERS) of flavone three its hydroxy derivatives, 3‐hydroxyflavone (3‐HF) 5‐hydroxyflavone (5‐HF) quercetin (3,5,7,3′,4′ pentahydroxyflavone) have been obtained. normal (NR) were taken in the powder form. SERS obtained both on Ag colloids electrode substrates. Assignments spectrally observed modes aided by density functional theory (DFT) calculations using B3LYP 6‐31 + G* basis, a split valence polarized basis set with diffuse functions....

Purpose Identification and characterization of organic pigments dyes used in works art cultural heritage material such as prints, drawings, manuscripts, paintings, textiles can provide important information for dating, authentication, conservation treatment these objects studying history general. Applications surface‐enhanced Raman scattering (SERS) this purpose have recently attracted increasing attention both academic scientists museum researchers. This paper aims to review the latest...

Abstract The highly fluorescent natural dye berberine can be easily identified in microscopic textile samples by surface‐enhanced Raman spectroscopy employing citrate‐reduced Ag colloid. ordinary (OR) and SERS spectra of are presented discussed the light a DFT calculation. Using FT‐Raman FT‐SERS we could reliably compare relative intensity shifts investigate adsorption geometry on nanoparticles. significant enhancement spectrum out‐of‐plane ring system bending deformation mode at 729 cm −1...

Mauve was the first synthetic organic dyestuff to be manufactured industrially. It synthesized in 1856 by William H. Perkin. is composed different molecules named mauveine A, B, B2 and C. In this study, dye synthesized, its individual components were analyzed ordinary Raman spectroscopy (both dispersive Fourier‐transform‐), surface‐enhanced spectroscopy, after separation thin‐layer chromatography. Only scattering (SERS) gave rise satisfactory spectra of dye. Five fractions separated on thin...

Surface-enhanced Raman scattering (SERS) was investigated for applications in the analysis of anthraquinone dyes used works art. Two SERS procedures were developed and evaluated with frequently dyes, alizarin, carminic acid lac dye. The first procedure involves removal a microscopic fragment containing alizarin from painting, layer silver nanoparticles thermally evaporated directly on to induce signal alizarin. applicability this analyzing solid samples color paintings discussed detail. In...

Abstract: We obtain the normal Raman and surface-enhanced spectrum of three controlled substances: morphine, codeine, hydrocodone. The spectra are assigned with aid density functional theory. Because rather intense fluorescence, suffer from poor signal-to-noise, even when differential subtraction techniques employed. On other hand, surface enhancement by Ag nanoparticles both enhances signal suppresses enabling far more sensitive detection identification. also present a set discriminant...

Surface‐enhanced Raman spectroscopy (SERS) has found increasing acceptance in art conservation and forensic science for its great potential detecting trace amounts of material. However, SERS is not a separation technique, and, therefore, it always suitable distinguishing different components mixture. Coupling thin layer chromatography (TLC) been investigated this article as tool the identification four alkaloids, namely harmalol, harmaline, harmane harmine, from seed extract Syrian rue (...

In the present study, a number of dark red microsamples from nine illuminated manuscripts three important medieval Portuguese monasteries (St. Mamede Lorvão, Holy Cross Coimbra and St. Mary Alcobaça) were analyzed using multi‐analytical approach to identify dyes, fillers, binders other additional paint components. Historically accurate reconstructions lac dye paints prepared according recipes treatises characterized as reference materials. Its purpose was create better means study this...

The development and application of proper sample pretreatments is often a key step toward the successful analysis dyes used as artists' materials by surface-enhanced Raman spectroscopy (SERS). Complexation organic colorants with metal ions to dye fabrics produce lake pigments, well undesired interactions other matrix components such substrate, binding media, fillers, extenders, are just some issues that typically complicate identification in minute samples from invaluable artworks museum...

AbstractUltraviolet-visible reflectance spectroscopy is a rapid and accurate technique for the investigation of painted surfaces. The use high efficiency beveled-tip fiber optic probe pulsed xenon source gives improved detection minimizes interference from ambient light, eliminating need to shield analyzed area allowing non-contact, non-invasive analysis. Thin washes organic colorants, often impossible sample, are ideally suited this kind This study describes in situ identification indigo,...

This work characterizes both tanning and colouring materials found in ancient Egyptian leather objects from the Metropolitan Museum of Art. The analytical investigations focused on assessing development technology tanners using high-performance liquid chromatography (HPLC), surface-enhanced Raman spectroscopy (SERS), X-ray fluorescence (XRF), Fourier transform infrared (FT–IR), radiography a scanning electron microscope connected to an energy-dispersive detector (SEM–EDX). Reference samples...

A widespread belief among scholars and connoisseurs of the Japanese color woodblock print (nishiki-e) holds that synthetic dyes were imported from West in 1860s, soon came to be used for all nishiki-e colorants during Meiji period. These "cheap aniline dyes" are widely described as "gaudy", "garish", "strident", thought stand sharp contrast more muted "natural" preceded them. This study calls this narrative into question through an analysis 1860 until 1900, using surface-enhanced Raman...

The triarylmethane dyes, basic fuchsine, methyl violet, and crystal were some of the first synthetic colorants to be produced after revolutionary invention mauve in 1856. While their attractive pink‐to‐violet hues made them immediately interesting textile industry arts, they are prone fade when exposed light. This work aims investigate violet degradation products through surface‐enhanced Raman spectroscopy (SERS), exploiting high sensitivity minimal sample requirement technique. SERS is not...

Winsor & Newton Ltd. has been one of the main fine art products providers since its establishment in 1832, being responsible for manufacture a wide assortment materials ranging from oils and pigments to brushes papers. All items produced over years have indexed comprehensive historical archive. Original handbooks are powerful resource which can offer insight into world artists' materials, knowledge choices through identification substances employed obtain particular colors. Scientific...

A surface‐enhanced Raman spectroscopy (SERS) substrate made of agar gel coupled with silver nanoparticles has been applied to the micro‐extraction and ultra‐sensitive detection dyes on pieces textile different nature (silk, wool, printed cotton) a mock‐up panel painting. In particular, Ag‐agar previously developed improved by addition chelating agent ethylenediaminetetraacetic acid (EDTA), which found play an important role as stabilizer nanocomposite matrix for improvement micro‐extractive...