Application of nanoelectrochemical and biotechnology techniques in the study and conservation of metallyc heritage
Esta página web, la base de datos, los web reports y toda la información que contiene es parte del proyecto I+D+I CTQ2014-53736-C3-1-P financiado por MCIN/AEI/10.13039/501100011033 y cofinanciado con fondos FEDER
Programas Nacionales del Plan Nacional I+D+I.
Period: 2015-2017
Partners: Dpt. Química Analítica, Universitat de València, Instituto Universitario de Restauración del Patrimonio, Universitat Politècnica de València.
Coordinator: Mª Teresa Doménech Carbó.
Subproject director: Antonio doménech Carbó
Subproject director: María Teresa Doménech Carbó
Summary
The present project is aimed to explore innovative techniques in both analysis and conservation of metallic heritage. Exploration of the feasibility of nanoelectrochemical techniques as a new advanced tool in the study and control of metallic archaeological and art objects is proposed in this project. As demonstrated in a prior project for pictorial objects, these techniques, providing simultaneous morphological and compositional data at nanoscale could alleviate much of the critical aspects concerning diagnostic of heritage in metal such as restrictions in sampling of archaeological artifacts with severe multilayered corrosion processes. These techniques also could improve the accurate control required during cleaning and consolidation treatments. On the other hand, conservation treatments based on cleaning of corrosion layers are often difficult tasks due to their complex composition so that conservators demand new and more accurate cleaning treatments. For this reason, a second objective of the project is the implementation of new biotechnological cleaning techniques and biological control. A pluridisciplinary team including chemists, biologists, geologists, conservators/restorators, art historians/archaeologists will work in three different research lines: a) chemical, mineralogical and morphological characterization at micro-, nanoscopic scale of corrosion products and material constituents of metal objects due to environmental and microbial attack, b) control of conservation treatments at micro and nanoscale by advanced electrochemical techniques and c) the development of innovative non-invasive and no-toxic cleaning and biocleaning treatment (new chemical formulations and biocleaning with microorganisms ) and control of the biodeterioration (phage therapy) for archaeological metal objects.
For this purpose, exploration in the metal heritage conservation context of the capabilities of four electrochemical techniques that work at nano scale is proposed: a) atomic force microscopy-voltammetry of nanoparticles; b) scanning electrochemical microscopy; c) voltammetry of micro/nanoparticles using the “one touch” sampling methodology; d) voltammetry of micro/nanoparticles using the “layer-by-layer” methodology accompanied by traditional voltammetric techniques and electrochemical impedance spectroscopy (EIS). Complementarily, efficiency of other nanomicroscopy techniques such as field emission FE-TEM 200 kV and FESEM, FESEM-FIB, AFM will be explored. These techniques will be applied in different steps of the project on: a) samples from a selection of metallic art and archaeological objects and b) innovative cleaning and biocleaning treatments. The project is completed with the development of an integrated analytical strategy in which nanoelectrochemical techniques will be combined with conventional techniques such as solid state electrochemistry, LM, SEM/EDX, TEM, XRD, FTIR spectroscopy, UV-spectrophotometry, colorimetry, HPLC-(PAD), SEC, GC/MS and Py-GC/MS, biochemistry and bioanalytical techniques, molecular techniques (PCR, proteomics). As final outcome of the project a knowledge base will be built, which includes the data from the series of instrumental analytical techniques applied to a selection of the case studies undertaken in the project.