文档介绍：Raman
Raman Microscopy
In Art and Archaeology
IlluminationIllumination ofof HistoricalHistorical MysteriesMysteries inin RockRock ArtArt andand FrescoesFrescoes
Howell . Edwards
Howell . he scientific study of works of art attribution of the historical period
Edwards is professor of
molecular spectroscopy in and the materials used in their and genuineness of an artifact. Use-
the Department of
Chemical and Forensic
Sciences at the University Tcreation has received impetus ful information about ancient tech-
of Bradford (Bradford, West
Yorkshire, BD7 1DP, UK ). with the development of nondestruc- nologies and methods used in the
He may be contacted by
phone at ϩ44 1274
233787, by fax at ϩ44 tive microsampling analytical tech- construction of works of art is now
1274 235350, or by e-mail
at @ niques and an increasing awareness ing; in particular, Raman
.
on the part of art historians, museum spectroscopists are realizing the chal-
conservators, and scientists of the im- lenge in the analytical characteriza-
portance of characterization for the tion of ancient materials showing
16 Spectroscopy 17(2) February 2002
Raman spectroscopists are realizing the
challenge in the analytical characterization
of ancient materials showing signs of being
degraded in their natural environments.
niques, no chemical or mechanical
pretreatment is necessary; of particu-
lar relevance to biological material
associated with the artwork through
biodeterioration processes is the
ability to obtain Raman spectra from
specimens that are in their state of
natural hydration without further
ation. The weak Raman scatter-
ing of hydroxyl groups and silica
means that water and glass will not
strongly affect the observation of
Raman spectra. In other cases,
specimens that have
signs of being degraded in their nat- been prepared for opti-
ural environments. cal microscopy and
A major advantage proposed