Наукові публікації університету

IR SPECTROSCOPY OF WATER PROPERTIES IN NANODIAMOND AGGLOMERATES

IR  SPECTROSCOPY OF WATER  PROPERTIES  IN  NANODIAMOND  AGGLOMERATES

Nikolai E. Kornienko1, Oleksandr М. Kutsay2, Alexander D.Rud3
1Taras Shevchenko National University of Kyiv, Volodymyrska street 64/13, Kyiv
2  V. Bakul Institute for Superhard Materials of the National Academy of Science of Ukraine, Kyiv
3  G.V. Kurdyumov Institute for Metal Physics of the National Academy of Science of Ukraine, Kyiv
Corresponding author e-mail: nikkorn@univ.kiev.ua


The peculiarity of the interaction of water with detonation nanodiamonds (ND) size of about 5 nm, there is a resonance valence fashion water νOH (vibrational band ~ 3000-3800 cm-1) with an overtone 3νD diamond fashion (νD = 1050-1332 cm-1), which is complemented by the proximity of the frequency the deformation mode of water νδ~1640 см-1 and graphite-like shell of ND νG=1580-1630 cm-1. The attenuated total reflection (ATR) spectra of dense and wet   agglomerates after 7 days and 7 years of their stay in distilled water and air drying to 8 days have been stading. Detected consistent monotonic change of the intensities of vibrational bands ND D ~ 1300-1330 cm-1, D(k) ~ 1050-1250 cm-1 and water νOH, νδ opposing changes broadband electronic background.
         The new anomalies of  nanowater in ND have been detected. The intensities of the bands νδ, νOH and νOH + νδ first increase and 6-14% higher than in the bulk water, despite the fact that the water in the agglomerates takes part volume. This is due to the strengthening of the system of hydrogen bonds (HB) due to the interaction with the surface -OH and    -C=O groups of ND, as evidenced by a noticeable increase in the longitudinal-transverse (LO-TO) splitting of the libration mode (620-770 cm-1). An increase of the intensitiy ratio water bands νOH and νδ between 4.8 and 5.4 and subsequent reduction to 2.8, which characterizes the initial gain and the subsequent weakening of the HB system. This is confirmed by high-frequency composite component offset νOH 1,2 valence band of water by reducing its content in the agglomerates. For the first time there were a number of difference and summary tones in the fields νδ and νOH with acoustic (TA, LA) and optical (TO, LO) collective modes of HB system. We discuss the significant influence of water on the vibrational bands on D, D(k). The regimes of improvement and deterioration of properties of ND, including water graphitization induced ND gain and attenuation bands -C=O and -CH2,3 groups. The record abnormal change in the properties of water in the agglomerates suggests the prospect of its biological and medical applications.

ID: 167577
Кількість показів: 44
дата змінення: 12.11.2016 12:56:49
Ким змінено (ім'я): (phys5) Микола Корнієнко
Вид роботи:  Наукова публікація
Тип роботи:  Тези
Кількість сторінок:  1
Рік видання:  2016
Звітний рік:  2016
Видання:  PHYSICS OF LIQUID MATTER: MODERN PROBLEMS
Номери сторінок:  23
Галузь науки:  Фізика
Автори,співробітники Університету:  Корнієнко Микола Євдокимович /  / 
Кількість недоданих авторів:  0
Кафедра / Відділ:  НДС Теоретична фізика і комп'ютерно-експериментальне моделювання / Теоретичної фізики
№ теми: 
Опубліковано за рішенням Вченої ради:  ні
Інститут/Факультет:  Фізичний факультет

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