X-ray photoemission spectroscopy and Fourier transform infrared studies of electrochemical doping of copper phthalocyanine molecule in conducting polymer

Kato, Hitoshi; Takemura, Susumu; Watanabe, Yohei; Ishii, A.; Tsuchida, Ikari; Akai, Yoshihiro; Sugiyama, Takeharu; Hiramatsu, Tomoyasu; Nanba, Noriyuki; Nishikawa, Osamu; Taniguchi, Masateru

doi:10.1116/1.2731347

Cited by 16 publications

(10 citation statements)

References 12 publications

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“…The peak at 1166 cm −1 is observed due to the presence of Cu-N bonding and those at 1286 and 1332 cm −1 are related to CvN-C bridge sites. 26 The confirmation of exact valence states of the constituent elements in CuPc nanotubes is further confirmed by X-ray photoelectron spectroscopy (XPS). Fig.…”

Section: Resultsmentioning

confidence: 87%

Efficient and persistent cold cathode emission from CuPc nanotubes: a joint experimental and simulation investigation

et al. 2014

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In the current report, chemically synthesized copper phthalocyanine (CuPc) nanotubes are shown to exhibit unprecedentedly well cold cathode emission characteristics with turn-on field (3.2 V μ m(-1)) and stable emission during long intervals (200 min). Simulation of electric field distribution via finite element method around an isolated nanotube emitter in a manner parallel to the experimental setup (inter-electrode distance = 180 μm) exhibits good corroboration of theoretical premises with experimental findings. Obtained results strongly indicate CuPc nanotubes to be potential candidate as cold cathode emitter for electron emission based applications such as field emission displays and vacuum nano-electronic devices.

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Section: Resultsmentioning

confidence: 87%

Efficient and persistent cold cathode emission from CuPc nanotubes: a joint experimental and simulation investigation

et al. 2014

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“…All the polymorphic forms of CoPc show common absorption peaks at 756 cm −1 , which is the Co‐N bond vibration. From the FTIR spectral comparison, we can see that the absorption band of CoPc nanowires, usually using C‐H out‐of‐plane bending as an indicator of the crystalline form in CoPc, appears at 730 cm −1 while the absorption band for the α‐CoPc is located at 724 cm −1 , for the β‐CoPc 733 cm −1 and for the χ‐ and π‐CoPc 732 cm −1 respectively . Other characteristic absorption bands located near 778 cm −1 and 1090 cm −1 , representing C = N in plane stretching vibration and C‐H in plane deformation respectively, are different among these polymorphs of CoPc.…”

Section: Resultsmentioning

confidence: 99%

“…We compared the FTIR spectra of CoPc nanowires and β‐CoPc with those of α‐, χ‐ and π‐CoPc reported by Brach et al . According to the study of FTIR spectra for CuPc and CoPc , the band assignments are summarized in Table S2. All the polymorphic forms of CoPc show common absorption peaks at 756 cm −1 , which is the Co‐N bond vibration.…”

Section: Resultsmentioning

confidence: 99%

Cobalt phthalocyanine nanowires: Growth, crystal structure, and optical properties

Zou

Gong

et al. 2015

Crystal Research and Technology

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Cobalt phthalocyanine nanowires with new crystal structure and broad optical absorption spectra were fabricated by using organic vapor phase deposition method. The morphology, crystal structure and optical properties of CoPc nanowires were characterized by SEM, X‐ray diffraction, Fourier transform infrared and UV‐visible spectroscopies. Analyses of X‐ray diffraction patterns and Fourier transform infrared spectra indicate that the crystal structure of CoPc nanowires represents a new polymorph, which is designated J‐CoPc. These J‐CoPc nanowires with high directionality (average diameter ∼50 nm) surprisingly possess much broader optical absorption spectra in the visible spectral region than those of the α‐ and β‐phase CoPc, enabling high potential for practical applications in novel molecular electronic/optical devices.

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“…Fig. 28 The X-ray photoelectron spectroscopy (XPS) technique has been used further to conrm the exact valence states of the constituent elements in CuPc nanotubes. The two strong peaks were observed at 2q ¼ 7.08 and 9.25 , which indicates the formation of pure b phases of CuPc nanotubes and all the peaks are well matched with standard JCPDS data card (number: 39-1881).…”

Section: Resultsmentioning

confidence: 99%

“…The others peaks at 1067, 1088 and 1121 cm À1 can be assigned to pyrrole in plane modes. 28 The X-ray photoelectron spectroscopy (XPS) technique has been used further to conrm the exact valence states of the constituent elements in CuPc nanotubes. XPS survey scan of CuPc nanotube is shown in ESI Fig.…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical investigation of enhanced cold cathode emission by plasma-etched 3d array of nanotips derived from CuPc nanotube

et al. 2015

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In the present work, we report fabrication and field emission responses of 3D copper phthalocyanine (CuPc) nanotip arrays synthesized over nanotube walls by facile plasma treatment. Significant field emission enhancement is confirmed for a nanotip-nanotube hybrid system (turn-on field 4.2 V mm À1 @10 mA cm À2 ) as compared to pristine CuPc nanotubes (turn-on field 6.8 V mm À1 @10 mA cm À2 ). Root of the observed enhanced cold cathode emission performances is further probed by a finite element method based simulation protocol that computed local electric field distribution for a single tube without and with plasma etching in a manner parallel to the experimental setup. Our obtained results strongly suggest that CuPc nanotip-nanotube hybrid nanostructures are a major potential candidate as field emitters for vacuum nanoelectronics and cold cathode based emission display applications.

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X-ray photoemission spectroscopy and Fourier transform infrared studies of electrochemical doping of copper phthalocyanine molecule in conducting polymer

Cited by 16 publications

References 12 publications

Efficient and persistent cold cathode emission from CuPc nanotubes: a joint experimental and simulation investigation

Efficient and persistent cold cathode emission from CuPc nanotubes: a joint experimental and simulation investigation

Cobalt phthalocyanine nanowires: Growth, crystal structure, and optical properties

Experimental and theoretical investigation of enhanced cold cathode emission by plasma-etched 3d array of nanotips derived from CuPc nanotube

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