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

Ghorai, Uttam Kumar; Das, Swati; Saha, Subhajit; Mazumder, Nilesh; Sen, Debabrata; Chattopadhyay, Kalyan Kumar

doi:10.1039/c4dt00300d

Cited by 27 publications

(34 citation statements)

References 46 publications

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“…The eld emission characteristics are shown in the Fig. [10][11][12][13][14][21][22][23][24][25][26] These values are also comparable various tube like eld emitter such as B-C-N microtube, Fe doped TiO 2 nanotube, ZnO nanotubes, boron nanotubes and carbon nanotubes. The turn-on eld and threshold eld in the case of CuPc nanotube was obtained 6.8 and 8.4 V mm À1 respectively, which get down-shied to 4.2 and 6.5 V mm À1 for the P-CuPc nanotips respectively.…”

Section: Resultsmentioning

confidence: 79%

“…10,18 In our experiment 0.0015 g CuPc powders (Sigma Aldrich) were dispersed in 200 ml chloroform solution. 10,18 In our experiment 0.0015 g CuPc powders (Sigma Aldrich) were dispersed in 200 ml chloroform solution.…”

Section: Experimental Characterizationsmentioning

confidence: 99%

“…In comparison to its peers, FED has advantages such as higher brightness, lower power consumption, larger color gamut and shorter response time. [7][8][9][10][11][12][13][14][15] Being highly resistant to chemical and thermal degradation, copper phthalocyanine CuPc is a superior candidate as a eld emitter among the organic semiconductors. Inspired by this speculated array of exciting features, several groups have focused their attentions to design excellent cold cathode emitting materials.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 79%

Section: Experimental Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…The detailed reaction mechanism for the formation of CuPc molecule is shown in the Figure S1. The The most significant peak at 1166 cm -1 is ascribed to the existence of Cu-N bonding in the CuPc molecule [28]. The peaks at 901, 1068, 1090, and 1119 cm -1 are assigned to pyrrole in plane modes of CuPc and the peak at 879 cm -1 indicates the pyrrole out-of-plane modes of phthalocyanine.…”

Section: Resultsmentioning

confidence: 98%

Electrosynthesis of Green Urea by co-reduction of N2 and CO2 Using Dual Active Sites of Copper Phthalocyanine Nanotube

Ghorai

Mukherjee

Paul

et al. 2021

Preprint

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Green synthesis of urea under ambient conditions by electrochemical co-reduction of N2 and CO2 gases using effective electrocatalyst essentially pushes the conventional two steps (N2 + H2 = NH3 & NH3 + CO2 = CO (NH2)2) industrial process at high temperature and high pressure, to the brink. The single step urea synthesis process has hit a roadblock due to the lack of efficient and economically viable electrocatalyst with multiple active sites for dual reduction of N2 and CO2 gas molecules to urea. Herein, CuPc nanotubes having multiple active sites (such as metal center, Pyrrolic-N3, Pyrrolic-N2, and Pyridinic-N1) are reported to exhibit urea yield of 143.47 µg h-1 mg-1cat and FE of 12.99% at –0.6 V vs RHE by co-reduction of N2 and CO2. Theoretical calculation suggests that Pyridinic-N1 and Cu centers are responsible to form C-N bonds for urea by reduction of N2 to NN* and CO2 to *CO respectively.

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“…the pyrrole out-of-plane modes of phthalocyanine. The peak at 1288 and 1334 cm -1 can be assigned to C=N-C bridge sites in CuPc [28,29]. Figure S3 shows the survey scan spectrum To study the electrocatalytic activity of CuPc NTs, electrochemical measurements were performed in a (N 2 + CO 2 ) purged and Ar saturated 0.1 M KHCO 3 electrolyte using Htype cell at room temperature and normal pressure (Shown in Figure S4).…”

mentioning

confidence: 99%

Electrosynthesis of Green Urea by co-reduction of N2 and CO2 Using Dual Active Sites of Copper Phthalocyanine Nanotube

Ghorai

Mukherjee

Paul

et al. 2021

Preprint

View full text Add to dashboard Cite

Green synthesis of urea under ambient conditions by electrochemical co-reduction of N 2 and CO 2 gases using effective electrocatalyst essentially pushes the conventional two steps (N 2 + H 2 = NH 3 & NH 3 + CO 2 = CO (NH 2 ) 2 ) industrial process at high temperature and high pressure, to the brink. The single step electrochemical green urea synthesis process has hit a roadblock due to the lack of efficient and economically viable electrocatalyst with multiple active sites for dual reduction of N 2 and CO 2 gas molecules to urea. Herein, copper phthalocyanine nanotubes (CuPc NTs) having multiple active sites (such as metal center, Pyrrolic-N3, Pyrrolic-N2, and Pyridinic-N1) are reported to exhibit urea yield of 143.47 µg h -1 mg -1 cat and FE of 12.99% at -0.6 V vs RHE by co-reduction of N 2 and CO 2 . Theoretical calculation suggests that Pyridinic-N1 and Cu centers are responsible to form C-N bonds for urea by reduction of N 2 to NN* and CO 2 to *CO respectively. This study not only provides the new mechanistic insight about the successful electro-reduction of dual gases (N 2 and CO 2 ) in a single component, but also helps to select for rational design of the efficient noble metal-free electrocatalyst for the synthesis of green urea.

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

Cited by 27 publications

References 46 publications

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

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

Electrosynthesis of Green Urea by co-reduction of N2 and CO2 Using Dual Active Sites of Copper Phthalocyanine Nanotube

Electrosynthesis of Green Urea by co-reduction of N2 and CO2 Using Dual Active Sites of Copper Phthalocyanine Nanotube

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