Real-time monitoring of the dissolution of silver nanoparticles by using a solid-contact Ag+-selective electrode

Alternative coulometric signal readout based on a solid-contact ion-selective electrode for detection of nitrate

“…Moreover, all of the cyclic voltammograms for the OMC modified GC electrode show two region characteristics. One is related to the redox process caused by the oxygen reduction from À0.5 to 0 V, and the other is related to the capacitive process with a near-rectangular shape from 0 to 0.5 V. Similar behaviors were also found for carbon nanotubes and graphene based solid contact [42,43], while there are slight differences from the our previous work [44], which may be due to the different thickness of the OMC-based solid contact.…”

Design Criteria for Nanostructured Carbon Materials as Solid Contacts for Ion‐Selective Sensors

“…Other porous carbon solid contacts that have been investigated include ordered mesoporous carbon (3.8-4 nm pores, long-term drift not reported but short term drift 28 μV s −1 at 1 nA compared to 1 μV s −1 at 1 nA for CIM carbon and 1.6 μV s −1 at 1 nA for 3DOM carbon), disordered mesoporous carbon (50 nm pores, short term drift 29 μV s −1 at 1 nA), mesoporous car-bon nanospheres templated using block-copolymer surfactants (Figure 5e,f; ≈2.35-3 nm pores; 28 μV h −1 over 70 h), and microporous carbon spheres (<2 nm pores; 14.9 μV h −1 over 20 h). [73][74][75] Multiple potential causes may be responsible for the poorer performance of these materials. The ordered and disordered mesoporous carbons were obtained from a commercial source, and the corresponding precursors and processing conditions were not provided.…”

A Novel Strategy for Visualizing, Tracing, and Measuring the Gastrointestinal Absorption of Silver Nanoparticles

“…Next, to demonstrate the feasibility of our strategy as proposed, the oxidative dissolution of particulate Ag was first examined in vitro using dilute H 2 O 2 solution as a strong oxidative agent, which is a recognized way for testing the dissolution behavior of AgNPs. [43,44] HRTEM images show that, after being treated with dilute H 2 O 2 solutions for 1 h, Au@AgNPs had thinner Ag shells until faded away, accompanied by the reappearance of the branches of the Au core (Figure 2a). Meanwhile, the size of AgNPs became smaller, reflecting by the disappearance of yellow color of their colloidal solutions and plasmonic peak (Figure S3a,b, Supporting Information), indicating that AgNPs oxidatively dissolved in the presence of H 2 O 2 as reported.…”

“…Meanwhile, the size of AgNPs became smaller, reflecting by the disappearance of yellow color of their colloidal solutions and plasmonic peak (Figure S3a,b, Supporting Information), indicating that AgNPs oxidatively dissolved in the presence of H 2 O 2 as reported. [43,44] In contrast, Au@AgNP dispersion exhibited a gradient color change from orange through brown and finally to light cyan that is the color of AuNP dispersion, whilst the plasmonic peak of Au@AgNPs continuously shifted from 436 to 762 nm (Figure S3c,d, Supporting Information). These phenomena suggest that, when Ag shell dissolved, Au@AgNPs underwent a morphologic change from the sphere to the star-like appearance, in agreement with HRTEM observations.…”