Enhanced triboelectric nanogenerators and triboelectric nanosensor using chemically modified TiO2 nanomaterials
Journal
ACS nano
Journal Volume
7
Journal Issue
5
Pages
4554
Date Issued
2013-05-28
Author(s)
Abstract
Mechanical energy harvesting based on triboelectric effect has been proven to be a simple, cost-effective, and robust method for electricity generation. In this study, we developed a rationally designed triboelectric nanogenerator (TENG) by utilizing the contact electrification between a polytetrafluoroethylene (PTFE) thin film and a layer of TiO2 nanomaterial (nanowire and nanosheet) array. The as-developed TENG was systematically studied and demonstrated as a self-powered nanosensor toward catechin detection. The high sensitivity (detection limit of 5 μM) and selectivity are achieved through a strong interaction between Ti atoms of TiO2 nanomaterial and enediol group of catechin. The output voltage and current density were increased by a factor of 5.0 and 2.9, respectively, when adsorbed with catechin of a saturated concentration, because of the charge transfer from catechin to TiO2. This study demonstrates the possibility of improving the electrical output of TENG through chemical modification.
Subjects
TiO2; catechin; nanosensor; chemical modification; triboelectric effect; charge transfer; CONTACT ELECTRIFICATION; TITANIUM-DIOXIDE
Publisher
AMER CHEMICAL SOC
Type
journal article