Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface

Xue Hua Zhang, Xiaodong Zhang, Jielin Sun, Zhixiang Zhang, Gang Li, Haiping Fang, Xudong Xiao, Xiaocheng Zeng, Jun Hu

Research output: Contribution to journalArticle

125 Citations (Scopus)

Abstract

We report a novel form of the gaseous state at the interface of water and highly oriented pyrolytic graphite (HOPG) that is induced by local supersaturation of gas. Such local supersaturation of gas next to the HOPG substrate can be achieved by (1) displacing an organic liquid with a gentle flow of water, (2) displacing cold water (∼0 °C) with a gentle flow of warm water (∼40 °C), or (3) preheating the HOPG substrate to ∼80 °C before exposing it to water at room temperature. In addition to the spherical-cap-shaped nanobubbles reported by many researchers, flat (quasitwo-dimensional, pancake-like) gas layers and nanobubble-flat gas layer composites (spherical-cap-shaped nanobubbles sitting on top of the quasi-two-dimensional gas layers) were detected. These entities disappeared after the system was subjected to a moderate level of degassing (∼0.1 atm for 1.5 h), and they did not form when the liquids involved in the aforementioned displacing procedure (to induce local supersaturation of gas) had been predegassed (to ∼0.1 atm). The stability and some physical properties of these newly found gaseous states are examined.

Original languageEnglish (US)
Pages (from-to)1778-1783
Number of pages6
JournalLangmuir
Volume23
Issue number4
DOIs
StatePublished - Feb 13 2007

Fingerprint

Graphite
pyrolytic graphite
Gases
Water
Supersaturation
supersaturation
gases
water
spherical caps
cold water
Flow of water
organic liquids
degassing
Preheating
Degassing
Liquids
Substrates
Physical properties
physical properties
heating

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Zhang, X. H., Zhang, X., Sun, J., Zhang, Z., Li, G., Fang, H., ... Hu, J. (2007). Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface. Langmuir, 23(4), 1778-1783. https://doi.org/10.1021/la062278w

Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface. / Zhang, Xue Hua; Zhang, Xiaodong; Sun, Jielin; Zhang, Zhixiang; Li, Gang; Fang, Haiping; Xiao, Xudong; Zeng, Xiaocheng; Hu, Jun.

In: Langmuir, Vol. 23, No. 4, 13.02.2007, p. 1778-1783.

Research output: Contribution to journalArticle

Zhang, XH, Zhang, X, Sun, J, Zhang, Z, Li, G, Fang, H, Xiao, X, Zeng, X & Hu, J 2007, 'Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface', Langmuir, vol. 23, no. 4, pp. 1778-1783. https://doi.org/10.1021/la062278w
Zhang XH, Zhang X, Sun J, Zhang Z, Li G, Fang H et al. Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface. Langmuir. 2007 Feb 13;23(4):1778-1783. https://doi.org/10.1021/la062278w
Zhang, Xue Hua ; Zhang, Xiaodong ; Sun, Jielin ; Zhang, Zhixiang ; Li, Gang ; Fang, Haiping ; Xiao, Xudong ; Zeng, Xiaocheng ; Hu, Jun. / Detection of novel gaseous states at the highly oriented pyrolytic graphite-water interface. In: Langmuir. 2007 ; Vol. 23, No. 4. pp. 1778-1783.
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