Journal
NANOTECHNOLOGY
Volume 23, Issue 36, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/36/365705
Keywords
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Funding
- National Research Foundation of Korea (NRF) [NRF-2012-0000785, NRF-2011-0020090]
- National Research Foundation of Korea
- Korean government (MEST) [2010-0020648, 2011-0026073]
- National Research Foundation of Korea [2011-0020090, 과C6A1905, 2007-2004045, 2010-0023202, 2007-0056656] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The work function of polyaniline nanoparticles in the emeraldine base state was determined by Kelvin probe force microscopy to be similar to 270 meV higher than that of similar nanoparticles in the emeraldine salt state. Normal tapping mode atomic force microscopy could not be used to distinguish between the particles due to their similar morphologies and sizes. Moreover, other potential measurement systems, such as using zeta potentials, were not suitable for the measurement of surface charges of doped nanoparticles due to their encapsulation by interfering chemical groups. Kelvin probe force microscopy can be used to overcome these limitations and unambiguously distinguish between the bare and doped polyaniline nanoparticles.
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