A long-term stable paper-based glucose sensor using a glucose oxidase-loaded, Mn2BPMP-conjugated nanocarrier with a smartphone readout. Issue 8 (27th January 2021)

• Record Type: Journal Article
• Authors: Yoo, Soyeon; Min, Kiyoon; Tae, Giyoong; Han, Min Su
• Is Part Of: Nanoscale. Volume 13:Issue 8(2021)
• Page Start: 4467
• Page End: 4474
• Publication Date: 2021-01-27
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr06348g
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A paper-type sensor system was devised using an enzyme-loaded, artificial peroxidase-conjugated nanocarrier to maintain long-term stability with smartphone readout. Abstract : A simple paper-based analytical device (PAD) for the one-pot detection of glucose was developed herein using an artificial peroxidase-functionalized and glucose oxidase (GOx)-loaded pluronic-based nanocarrier (PNC). Mn2 BPMP (BPMP; 2, 6-bis[(bis(2-pyridylmethyl)amino)-methyl]-4-methylphenolate), an artificial peroxidase, was conjugated to PNC, allowing GOx to be loaded with a very high encapsulation efficiency. In solution, Mn2 BPMP-PNC showed higher peroxidase-like catalytic efficiency than did Mn2 BPMP at physiological pH. In addition, glucose detection via enzyme cascade reaction between GOx and Mn2 BPMP in the GOx loaded-Mn2 BPMP-PNC was more sensitive than the simple combination of Mn2 BPMP and GOx with excellent selectivity. Subsequently, a PAD was fabricated using a laser printer with an assay substance containing GOx loaded-Mn2 BPMP-PNC and peroxidase chromogenic substrate. The prepared Mn2 BPMP-PNC-based PAD quantitatively measured glucose in human serum ranging from normal levels to those typical for diabetics as well as in buffer by obtaining RGB (red, green, and blue) color values through smartphone readout or the naked eye. Importantly, the present PNC-based PAD maintained the detection efficiency during storage at room temperature for 6 weeks in contrast to the rapid decrease in detection efficiency obtained for PAD containing Mn2 BPMP and GOx without PNC.