Synthesis and characterization of β-Ni(OH) 2 up grown nanoflakes by SILAR method

S. B. Kulkarni, V. S. Jamadade, D. S. Dhawale, C. D. Lokhande

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In this paper we report a "bottom up" approach to synthesize β-Ni(OH) 2 nanoflakes using novel successive ionic layer adsorption and reaction (SILAR) method. Ni(OH) 2 thin films have been deposited on glass substrate using aqueous alkaline nickel chloride as nickel ion source and double distilled water maintained at 353 K temperature as hydroxyl ion source. The structural, surface morphological, optical and electrical properties of films are examined. The nanocrystallinity and β-phase of Ni(OH) 2 are confirmed by X-ray diffraction and FT-IR studies. Scanning electron microscope study revealed microporous and random distribution of well up grown interlocked nanoflakes. Optical absorption studies show wide optical band gap of 3.26 eV for β-Ni(OH) 2 . The electrical properties revealed that β-Ni(OH) 2 has negative temperature coefficient of resistance with p-type semiconducting behaviour. The electrochemical property studied by cyclic voltametry in 2 M KOH electrolyte solution revealed pseudo capacitive behaviour, when β-Ni(OH) 2 thin film employed as working electrode in three electrode electrochemical cell with platinum as counter electrode and saturated calomel as reference electrode. The specific capacitance of 350 F g -1 is obtained with nanoflake like morphology.

Original languageEnglish
Pages (from-to)8390-8394
Number of pages5
JournalApplied Surface Science
Issue number20
Publication statusPublished - 30 Jul 2009



  • Nanoflakes
  • Optical and electrical properties
  • SILAR method
  • Thin film
  • β-Ni(OH)

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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