A Cholesterol Biosensor Based on the NIR Electrogenerated-Chemiluminescence (ECL) of Water-Soluble CdSeTe/ZnS Quantum Dots

Abstract

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Graphene quantum dot electrochemiluminescence increase by bio-generated H 2 O 2 and its application in direct biosensing

“…For an ECL system, high ECL emission intensity is essential to achieve a high sensitivity; therefore, high sensitivity can be expected for the GQD/GOx ECL system. Additionally, in the ECL study, the ECL onset potential of GQD/GOx at more positive potential (−0.6 V) was very attractive in comparison with previously reported values based on other heavy metal quantum dot systems, which could result in less interference from other electroactive substances [29][30][31]. To learn more about the ECL emission mechanism of GQD, the CVs and ECL of GQD on Ti foil have been examined in 0.067 mol l −1 pH ∼7 PBS with N 2 -saturated and 0.1 mmol l −1 H 2 O 2 , respectively.…”

Amplified solid-state electrochemiluminescence detection of cholesterol in near-infrared range based on CdTe quantum dots decorated multiwalled carbon nanotubes@reduced graphene oxide nanoribbons

“…Semiconductor quantum dots (QDs), on account of their high fluorescence quantum yields, stability against photo-bleaching, and size-controlled luminescence properties, have received tremendous attention in the fabrication of solid-state ECL systems (Bertoncello and Forster, 2009;Jiang et al, 2015;Stewart et al, 2015; Wei et al, 2013). To achieve efficient ECL of QDs for bioanalysis, it is an interesting approach for integrating QDs with carbon nanomaterials such as carbon nanotubes (CNTs) and graphene, which could not only amplified the ECL intensity but also reduced the over-potential of ECL systems (Chen et al, 2011;Li et al, 2011b;Wang et al, 2009Wang et al, , 2010.…”

Iridium(III)‐Doped Core‐Shell Silica Nanoparticles: Near‐IR Electrogenerated Chemiluminescence in Water

“…[12,14,[25][26][27][28] On the other hand, the ability of generating ECL in near-IR is especially important for bioimaging application as biological autofluorescence and tissue absorption are minimized in the wavelength range 650-900 nm. [29,30] Near-IR ECL emission is usually obtained with quantum dots (such as CdSeTe, InAs, PbSe, CdP and CuInS) [31,32] and with gold nanoclusters in the pioneering works from Ding and coworkers. [33] However, examples of transition metal complexes which are able to give ECL in this emission region have been scarce until very recently.…”