Nannochloropsis Oceanica derived nitrogen-rich macroporous carbon for bi-atomic matching-catalytic flexible dopamine sensor

Graphdiyne chelated AuNPs for ultrasensitive electrochemical detection of tyrosine

“…The shift of the oxidation peak of the DPV curves with increased Tyr concentration should be caused by a change in electrolytic conductivity. 25 Additionally, GDY@AuNPs retains 91.9% of its initial response for the same concentration of Tyr (100 mM) after storage under ambient conditions for 5 weeks, suggesting outstanding stability (Fig. 3D).…”

“…The results show that GDY@AuNPs (1 : 3) has an onset potential of 0.52 V, whose electronegativity is better than that of GDY@AuNPs (1 : 2) (0.56 V), GDY@AuNPs (1 : 4) (0.54 V), AuNPs (0.58 V) or GDY (0.57 V). It is known that the onset potential has the least current flow for an insignificant IR drop effect, and thus is often used to measure the catalytic activity, 25 since the more negative onset potential the higher electrocatalytic activity for an electrochemical oxidation. 26 The results discussed above evidently confirm that GDY@AuNPs (1 : 3) possesses the highest catalytic activity among all materials, thereby enabling its fastest charge transfer rate and it is used for the following tests.…”

Rich‐defect carbon nanotubes for highly sensitive detection of Dopamine

“…Currently, a variety of sensing materials such as carbon nanomaterials [16,18], metal and metal oxide nanoparticles [19], conductive polymers [20,21] and transition-metal complexes [22,23] have been investigated for electrochemically sensing DA. For example, nitrogen rich macroporous carbon (NMC) [22], ZnNi-NPs-f/ MWCNT [24], gallium liquid metal on SWCNT-AuNPs [25], polypyrrole/CNTs [26], Rhenium oxide/reduced graphene oxide (ReO 3 /rGO) [17] and so on have been reported. Nevertheless, these approaches either have complicated synthesis procedures, or high cost to largely limit their scalability for commercialization.…”

“…Currently, a variety of sensing materials such as carbon nanomaterials [16, 18], metal and metal oxide nanoparticles [19], conductive polymers [20, 21] and transition‐metal complexes [22, 23] have been investigated for electrochemically sensing DA. For example, nitrogen rich macroporous carbon (NMC) [22], ZnNi‐NPs‐f/MWCNT [24], gallium liquid metal on SWCNT‐AuNPs [25], polypyrrole/CNTs [26], Rhenium oxide/reduced graphene oxide (ReO 3 /rGO) [17] and so on have been reported. Nevertheless, these approaches either have complicated synthesis procedures, or high cost to largely limit their scalability for commercialization.…”

Interfacial Regulation of ZIF-67 on Bacteria to Generate Bifunctional Sensing Material on Chip for Qualifying Cell-Released Reactive Oxygen Species

“…Bacteria are widely distributed in nature and have been explored as natural templates for preparation of nano-/microstructured carbons with high specific surface area. , In our previous work, bacteria were used as templates to fabricate a nitrogen-doped porous carbon nanorod, which was further loaded with AuNPs to construct a sensitive dopamine sensor . It is found that effective nitrogen doping is beneficial to improve the hydrophilic nature and catalytic performance of the carbon materials, providing a biocompatible C–N microenvironment. , Previously, bacteria have served as a template for ZIF-8 to prepare hierarchical porous carbons by pyrolysis .…”