ROBERTA BRAYNER roberta by ghY0mL8


Université Paris 7 Denis Diderot
Interfaces, Traitements, Organisation et Dynamique des Systèmes - ITODYS, CNRS - UMR 7086 ,
Couloir 44-45, 5eme etage, case 7090
2, Place Jussieu - 75251 Paris - Cedex 05
Tel: 33 1 44 27 95 41 or 33 6 10 85 63 26

Dr Roberta Brayner was recruited by Paris Diderot University in 2003 to expand its
nanotechnology program. She conducts basic and applied research at the intersection of
chemistry, physics and biology towards (i) the development of hybrid “living” materials based on
micro-algae and nanoparticle interactions and also (ii) the toxicological impact of nanoparticles.
Her research has been supported by grants from ANR ECCO and NanoSciences-Ile de France. Dr
Roberta Brayner obtained her BS in Chemical Engineering in Brazil in 1995 and her Ph.D. in
Chemistry from Paris Diderot University in 2001. She is a frequent contributor to Journal of
Material Chemistry, Chemistry of Materials, Nano Letters, and other peer-reviewed journals.


Nanotechnology is a relatively new and vast field. With the increased presence of nanomaterials
in commercial products such as cosmetics and sunscreens, fillers in dental fillings, water
filtration process, catalysis, photovoltaic cells, a growing public debate is emerging on
toxicological and environmental effects of direct and indirect exposure to these materials. At
present, these effects are not completely elucidated.
Even though nanotechnology is a fairly new field, nanomaterials are not. Au and Ag
nanoparticles were already used in Persia in the 10th century B.C. to fabricate ceramics in which
the glaze contains small particles that provide a lustrous or iridescent effect. This technique was
then brought to Spain, and improved by the Moors by the 14th century, and finally spread
throughout much of Europe. In addition, over 5000 years ago, the Egyptians ingested Au
nanoparticles for mental and bodily purification. In all cases, the users did not know that they
were nanoparticles.
Nanomaterials toxicity on living cells and in environmental air pollution is a very large research
field. Here I will show some relevant studies about the toxicological impact using oxide
nanoparticles (ZnO) and Au nanoparticles, on living cells.

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