2022
DOI: 10.1021/acs.analchem.2c04328
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Novel Photoelectrochemical Biosensing Platform Based on a Double Type II CdLa2S4/SnIn4S8/Sb2S3 Ternary Heterojunction as Photoactive Materials and NiCo2O4 Nanospheres as a Photoquencher for CA19-9 Detection

Abstract: A novel signal-off biosensing platform based on the CdLa2S4/SnIn4S8/Sb2S3 heterojunction as photoactive materials and NiCo2O4 nanospheres as a photoquencher was developed to achieve the sensitive detection of CA19-9. First, the narrow band gap hydrangea-like CdLa2S4/SnIn4S8/Sb2S3 not only provided excellent photocurrent response but also supplied a mass of active sites that facilitated the loading of capture antibody (Ab1). Second, a double type II CdLa2S4/SnIn4S8/Sb2S3 heterojunction promoted the fast separat… Show more

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Cited by 16 publications
(2 citation statements)
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“…3D shows the presence of Au (84.0 and 87.7 eV). 44 These results confirm that NiCo 2 O 4 -Au has been synthesized successfully.…”
Section: Resultssupporting
confidence: 76%
“…3D shows the presence of Au (84.0 and 87.7 eV). 44 These results confirm that NiCo 2 O 4 -Au has been synthesized successfully.…”
Section: Resultssupporting
confidence: 76%
“…Alternatively, photoelectrochemical (PEC) immunosensors have attracted significant attention and are widely applied in the analysis and detection technological fields owing to their fantastic advantages, including fast response, high sensitivity, and high specificity. 20,21 PEC immunosensors can effectively reduce the interference of background signal by separating the excitation signal (light) and response signal (current), leading to ultra-high sensitivity and excellent stability. 22,23 For example, Wang et al fabricated a CdS/CuInS 2 /Au/TiO 2 nanotube array photoelectric sensor with immobilized aptamers on the electrode surface for the sensitive detection of Cyt c. 24 Moreover, photoactive materials with high photoelectric conversion efficiency are crucial in the application of PEC immunosensors, which can significantly improve the sensitivity in PEC detection fields.…”
Section: Introductionmentioning
confidence: 99%