Published January 1, 2016
| Version v1
Journal article
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On the existence of two states in liquid water: impact on biological and nanoscopic systems
Description
This work reviews several properties of liquid water, including the
dielectric constant and the proton-spin lattice relaxation, and draws attention to
a bilinear behaviour defining a crossover in the temperature range 50 ± 10°C
between two possible states in liquid water. The existence of these two states in
liquid water plays an important role in nanometric and biological systems.
For example, the optical properties of metallic (gold and silver) nanoparticles
dispersed in water, used as nanoprobes, and the emission properties of CdTe
quantum dots (QDs), used for fluorescence bioimaging and tumour targeting,
show a singular behaviour in this temperature range. In addition, the structural
changes in liquid water may be associated with the behaviour of biological
macromolecules in aqueous solutions and in particular with protein
denaturation.
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