Cell-spreading electrochemical sensor explores single-cell and tumor-cell detection
Published in Journals, Nanomedicine, Tools.
Published November 1, 2026.
A Nature Communications study published on October 31 reports an electrochemical platform designed to detect individual cells and explore circulating tumor cell detection.
Qi and colleagues found that measurable current arose from redox probes near the cell–electrode interface. Encouraging cells to spread enlarged that interface and amplified the signal. Their platform combines a conductive reduced-graphene-oxide/Ti3C2Tx chip with an iron-based single-atom nanozyme.
The researchers reported a 7.6-fold signal increase over conventional chips and a distinguishable response from one cell on a 2 cm² chip. In an exploratory evaluation using 55 blood samples, the system distinguished cancer patients from healthy controls with 87% sensitivity and 96% specificity.
Those results do not establish accuracy for population screening, early-stage cancer detection or other diseases. Broader independent clinical validation is needed, and a laboratory detection limit does not by itself demonstrate clinical benefit. The authors report no competing interests. This peer-reviewed accepted article remains subject to editorial changes.
Source: Qi et al., Nature Communications, October 31, 2026.