Enzymeless glucose sensor based on disposable Ecoflex®/graphite thermoplastic composite substrate modified with Au@GQDs

•A thermoplastic carbon composite electrode using Ecoflex and graphite was fabricated.•The thermoplastic sensor presented an excellent electrochemical performance for glucose sensing.•The modified Ecoflex:graphite/Au@GQDs device enables sensitive detection of glucose.•The thermoplastic electrochemical device presents portable and disposable features.