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RISS 인기검색어
- 검색키워드
- 저자 : J.S. Quinton (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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RF plasma functionalized carbon surfaces for supporting sensor architectures
J.S. Quinton,A. Deslandes,A. Barlow,J.G. Shapter,C. Fairman,J.J. Gooding,D.B. Hibbert 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Carbon has a number of properties that make it ideal for use in sensor and electrical applications. Using radio frequency plasma with different precursor gases and operating plasma conditions, it is possible to pre-treat a variety of carbon surfaces in preparation for further molecular attachment, or surface functionalization. Research in our laboratory involves studies on highly ordered pyrolytic graphite (HOPG) as a model carbon substrate and pyrolysed photoresist films (PPF). Plasma treated surfaces have been characterised using a variety of surface sensitive techniques. We will report on results obtained using X-ray photoelectron spectroscopy to probe the chemical nature of the treated surfaces, and hence the extent of treatment. Time of flight secondary-ion mass spectrometry (ToFSIMS) has been utilised to determine the extent of hydrogenation after plasma treatment. Scanning tunnelling microscopy (STM) measurements provide morphological information about the treated surfaces, in particular damage and a severe change in surface structures that may be caused by various plasma treatments. Etching and/or nucleation and growth features are also observed and will be discussed, with the types of features and their distribution strongly dependent on the precursor gas that is used to support the plasma. Carbon has a number of properties that make it ideal for use in sensor and electrical applications. Using radio frequency plasma with different precursor gases and operating plasma conditions, it is possible to pre-treat a variety of carbon surfaces in preparation for further molecular attachment, or surface functionalization. Research in our laboratory involves studies on highly ordered pyrolytic graphite (HOPG) as a model carbon substrate and pyrolysed photoresist films (PPF). Plasma treated surfaces have been characterised using a variety of surface sensitive techniques. We will report on results obtained using X-ray photoelectron spectroscopy to probe the chemical nature of the treated surfaces, and hence the extent of treatment. Time of flight secondary-ion mass spectrometry (ToFSIMS) has been utilised to determine the extent of hydrogenation after plasma treatment. Scanning tunnelling microscopy (STM) measurements provide morphological information about the treated surfaces, in particular damage and a severe change in surface structures that may be caused by various plasma treatments. Etching and/or nucleation and growth features are also observed and will be discussed, with the types of features and their distribution strongly dependent on the precursor gas that is used to support the plasma.
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The photovoltaic properties of phenyl-capped thiophene oligomers
C. R. McNeill,M. J. Clifton-Smith,J. S. Quinton,B. V. King,S. Hotta,P. C. Dastoor 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The photovoltaic properties of a series of phenyl-capped oligothiophenes are presented. Photovoltaic devices were prepared assandwich type devices, with thin lms of the oligomers vacuum deposited onto indium tin oxide (ITO) coated glass, and then coatedwith aluminium. The photovoltaic response observed was most pronounced for oligomers containing ve thiophene units, with ashort circuit current of 0.5 mA/cm2 and an open circuit voltage of 1.3 V under 100 mW/cm2 of simulated sunlight. These resultscorrespond to an overall power conversion eciency of. 0.15%, which is remarkably high for a photovoltaic cell made from a single conjugated material, and signicantly greater than similarly prepared octithiophene devices. Short circuit photocurrent actionspectra are also reported for these devices, and their device physics discussed, including the inuence of conjugation length.
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