Amorphous Carbon Film with Self‐modified Carbon Nanoparticles Synthesized by Low Temperature Carbonization of Phenolic Resin for Simultaneous Sensing of Dopamine and Uric Acid

Abstract

A self-modified film electrode consisting of homogeneous snowflake-shaped nanoparticles on the amorphous carbon substrate (HNAC) was prepared by low temperature carbonization of phenolic resin. Such a unique structure was beneficial to enhance the electroanalysis signal responds. Simultaneous detection of DA and UA was performed on the HNAC using differential pulse voltammetry (DPV) at pH 8 phosphate buffer. The well-defined oxidation peak potential separation reached 260 mV between DA and UA. Meanwhile, the detection limit of HNAC were 0.401 μM (DA) and 2.800 μM (UA).

Amorphous Carbon Films for Electronic Applications

“…This section proposes potential practical applications of the a-C thin films on the basis of corresponding recent achievements. The applications in which the a-C thin films can function by themselves such as hardmask, [102][103][104][105] EUV pellicle, [106] and diffusion barrier [38,66,107,108] are discussed first, and the applications as a system of the device are followed, including deformable electrodes and interconnections, [14,15,109] sensors, [110][111][112][113][114][115][116][117][118][119][120][121][122][123] active channel layers, [124] electrodes for energy devices, [125,126] micro-supercapacitors, [125,127,128] batteries, [43,129] nanogenerators, [44,126] EMI shielding, [41] and nanomembranes. [128][129][130]…”

“…With adjusted conductivity and rich surface chemistry of the carbon-based materials, the a-C thin films can be used as sensing materials. Various sensors based on the a-C thin film have shown the possibility of practical detection of mechanical [110][111][112][113][114][115][116][117][118][119][120][121][122] and optical stimuli, [73,74,[113][114][115][116] humidity, [117][118][119][120][121] and chemical changes. [5,122,123] Ma et al reported a piezoresistive ta-C sensor for detecting compression and stretch (Figure 10a).…”

“…Various sensors based on the a-C thin film have shown the possibility of practical detection of mechanical [110][111][112][113][114][115][116][117][118][119][120][121][122] and optical stimuli, [73,74,[113][114][115][116] humidity, [117][118][119][120][121] and chemical changes. [5,122,123] Ma et al reported a piezoresistive ta-C sensor for detecting compression and stretch (Figure 10a). [110] The patterned ta-C thin films (180 nm in thickness) having different sp 2 cluster sizes were prepared on an SiO 2 substrate.…”

“…Specific interests have been placed on the detection of dopamine (DA) and uric acid (UA). [ 122 ] Li et al demonstrated a chemical sensor to simultaneously detect DA and UA by employing the a‐C thin film carbonized from phenolic resin on the surface. [ 122 ] The sensor clearly separated the peaks from DA and UA based on the electron affinity difference of the molecules.…”