Abstract
The strength of hydrogen bond (HB) decides water’s property and activity. Here we propose the mechanisms on creation and persistence of innovatively prepared liquid water, which is treated by Au nanoparticles (AuNPs) under resonant illumination of green-light emitting diode (LED) to create Au NP-treated (sAuNT) water, with weak HB at room temperature. Hot electron transfer on resonantly illuminated AuNPs, which is confirmed from Au LIII-edge X-ray absorption near edge structure (XANES) spectra, is responsible for the creation of negatively charged sAuNT water with the incorporated energy-reduced hot electron. This unique electronic feature makes it stable at least for one week. Compared to deionized (DI) water, the resulting sAuNT water exhibits many distinct properties at room temperature. Examples are its higher activity revealed from its higher vapor pressure and lower specific heat. Furthermore, Mpemba effect can be successfully explained by our purposed hypothesis based on sAuNT water-derived idea of water energy and HB.
Highlights
A unique feature of liquid water is its highly labile state of a network of hydrogen bonds (HBs), in which the breaking and reforming of HBs occur at a picosecond time scale[1,2]
Surface plasmon resonance (SPR) excited the illuminated Au nanoparticles (AuNPs) to decay into energetic hot electrons, and instantaneously, hot electron transfer (HET) was utilized to create sAuNT water with reduced HBs11
AuNPs (~15 nm) were loaded on ceramic particles with ca. 92% dielectric support of SiO2. This dielectric support ensures the effective availability of produced hot electrons and localization of hot electron-related reactions taking place on the illuminated AuNPs surface
Summary
Bonds received: October 2015 accepted: February 2016 Published: 26 February 2016. We propose the mechanisms on creation and persistence of innovatively prepared liquid water, which is treated by Au nanoparticles (AuNPs) under resonant illumination of green-light emitting diode (LED) to create Au NP-treated (sAuNT) water, with weak HB at room temperature. Hot electron transfer on resonantly illuminated AuNPs, which is confirmed from Au LIII-edge X-ray absorption near edge structure (XANES) spectra, is responsible for the creation of negatively charged sAuNT water with the incorporated energy-reduced hot electron. This unique electronic feature makes it stable at least for one week. Some distinct properties, including the activity and low specific heat, of sAuNT water are described for the first time
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