Conductive amorphous hydrocarbon film for bio-sensor formed by low temperature neutral beam enhanced chemical vapor deposition

Incorporating Graphitic Carbon Nitride (g‐C3N4) Quantum Dots into Bulk‐Heterojunction Polymer Solar Cells Leads to Efficiency Enhancement

“…In the FTIR spectrum of bulk g-C 3 N 4 , the vibrational peaks at 1257, 1463 and 1641 cm −1 correspond to the typical stretching modes of CN heterocycles, and the peak at 805 cm −1 was ascribed to the breathing mode of the triazine moiety (see Figure S1a, Supporting Information). [ 28,29 ] Noteworthy, these characteristic vibrational peaks of bulk g-C 3 N 4 are clearly observed in the FTIR spectrum of C 3 N 4 QDs (see Figure S1b, Supporting Information), indicating that the triazine units [ 30 ] suggesting the involvements of carboxylate and CH x groups during acidification and solvothermal treatments. [ 26 ] It is these additional functional groups and the few-layered structure that make C 3 N 4 QDs much more dispersible in o -dichlorobenzene than the bulk g-C 3 N 4 .…”

Amorphous carbon nitride thin films for electrochemical electrode: Effect of molecular structure and substrate materials

“…The toluene concentration in the Ar was 30% with 5.6 Pa of deposition pressure controlled by a turbomolecular pump with adjustable orifice to obtain highly conductive a-C:H [17]. For doping nitrogen into the film, nitrogen and hydrogen gases were mixed in Ar.…”

“…The details of the IR spectra of the PAH structure had been investigated in our previous work. Therefore, here, the calculation of the area ratio of PAH was carried out in the same way [17].…”

“…Generally, in the PECVD process, precise control of molecular structure is difficult due to excess decomposition of material gas by plasma excitation. We have previously demonstrated the formation of a non-porous ultra-low-k SiOCH film with a sufficient film modulus [16] and conductive amorphous carbon (a-C:H) film at low temperature by NBECVD [17]. In particular, our conductive a-C:H film had the potential to be used as an electrode material for electrochemical measurements for Bio-LSI.…”

“…This large PAH molecular structure has a conjugated system with delocalized p electrons providing the electrical conductivity of the film and helping the electron transfer during the electrochemical reactions. The nitrogen doping into PAH (N-PAH) improved the electrochemical properties; however, the a-CN:H grown on Si did not have good enough electrochemical properties compared with the graphite electrode formed by PECVD and post annealing at 600°C [17]. Moreover, the adhesion of carbon film on biocompatible metals is known to be relatively poor generally; therefore, the films are often easily delaminated from the metal substrate [18].…”