Lingmeng Fang, Yunhai Zhang, Hao Li, Jing Yu, Maosen Yang
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Detection of Lung Cancer Aldehydes Biomarker by Al2O3/Ag/ZIF-8 SERS Quasi Cavity with Co-Confinement Effect
The utilization of surface-enhanced Raman scattering (SERS) technology for monitoring aldehydes in human exhaled gas represents a burgeoning method for early screening of lung cancer; however, it currently faces several challenges: firstly, the limited capacity of SERS substrates to capture aldehyde molecules, and secondly, the low degree of co-localization between aldehyde molecules and hotspot spatial distribution. To address these issues, this study proposes an Al2O3/Ag/ZIF-8 SERS quasi-cavity structure, which enables the dual regulation of intramolecular hotspots, the capture of gaseous analytes, and the micro-localized co-localization of "hotspots-analytes." Leveraging this structure, we achieved sensitive detection of ethyl benzaldehyde molecules over a concentration range of 0.2 ppb-20 ppm, and preliminarily explored its specific recognition of aldehyde biomarkers in human exhaled gas. This research provides a versatile SERS detection strategy for gaseous molecules, offering significant reference value for the accurate detection of various cancer-associated gaseous biomarkers in human exhalations.
期刊介绍:
Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.