Abstract
Flexible physiological medical devices have gradually spread to the lives of people, especially the elderly. Here, a flexible integrated sensor based on Au nanoparticle modified copper hydroxide nanograss arrays on flexible carbon fiber cloth (Au@Cu(OH)2/CFC) is fabricated by a facile electrochemical method. The sensor possesses ultrahigh sensitivity of 7.35 mA mM−1 cm−2 in the linear concentration range of 0.10 to 3.30 mM and an ultralow detection limit down to 26.97 nM. The fantastic sensing properties can be ascribed to the collective effect of the superior electrochemical catalytic activity of nanograss arrays with dramatically enhanced electrochemically active surface area as well as mass transfer ability when modified with Au and intimate contact between the active material (Au@Cu(OH)2) and current collector (CFC), concurrently supplying good conductivity for electron/ion transport during glucose biosensing. Furthermore, the device also exhibits excellent anti-interference and stability for glucose detection. Owing to the distinguished performances, the novel sensor shows extreme reliability for practical glucose testing in human serum and juice samples. Significantly, these unique properties and the soft structure of silk fabric can provide a promising structure design for a flexible micro-device and a great potential material candidate of electrochemical glucose sensor.
Highlights
Diabetes mellitus, known as the disease of affluence, is caused by both genetic and environmental factors
The copper film is plated on carbon fiber cloth (CFC) successfully and the deposited copper is a layer of coarse copper particles, which can greatly increase the contact area between the copper film and the electrolyte solution
Cu(OH)2 arrays with a diameter about 100–280 nm and length of 1.5–2.0 μm show grass-like morphology on the surface of CFC (Figure 2C), which was converted from Cu/CFC by repeatedly scanning with linear sweep voltammetry (LSV)
Summary
Known as the disease of affluence, is caused by both genetic and environmental factors. There is no radical cure for diabetes, but it can be controlled by various treatments. It will cause many serious complications when not diagnosed and treated in time [1]. One effective way to prevent such dire consequences is to monitor blood sugar levels accurately on a daily basis. A flexible glucose sensor with high reliability and portability is important [2,3]. Most studies have focused on the preparation and application of flexible glucose sensor materials [4,5,6,7] and integrating flexible non-enzymatic glucose sensors has rarely been reported before
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