Ultrasensitive and selective sensors for glucose detection based on thiol-functionalized heterogenous gold/graphene/copper film
AssigneeKing Faisal University
InventorsCHAWKI AWADA, HASSAN HAMMUD, FRANCESCO RUFFINO
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Abstract
An electro-chemical sensor based on 4-nitrothiophenol (4-NTP) functionalized heterogeneous layers of gold/graphene/Cu for highly sensitive detection of sugars, alcohols, and/or organic compounds in a sample is developed. 4-NTP molecules were immobilized into the surface of gold nanostructures. Due to the adsorption of 4-NTP on the surface, the new sensors showed more sensitivity and selectivity than conventional sensors.
Claims10
An electro-chemical sensor comprising a composite film electrode, wherein the composite film electrode comprises:
- a copper substrate layer;
- a graphene layer on a top surface of the copper substrate layer;
- and
- a gold layer formed from RF sputtering gold nanostructures on a top surface of the graphene layer resulting in a two-dimensional quasi-continuous film of gold with a fill fraction of about 80%, wherein the gold layer is functionalized with 4-nitrothiophenol (4-NTP) molecules, and wherein the composite film electrode is mounted on a silver wire.
An electro-chemical sensor comprising a composite film electrode, wherein the composite film electrode comprises:
- a silver wire layer;
- a paraffin insulator wrapped around a first portion of the silver wire layer;
- a copper substrate layer wrapped on a second portion of the silver wire layer proximate to the first portion, wherein the copper substrate layer forms a conical shape;
- a graphene layer on a top surface of the copper substrate layer;
- and
- a gold layer formed from RF sputtering gold nanostructures on a top surface of the graphene layer resulting in a quasi-continuous film of gold with a fill fraction of about 80%,
- wherein the gold layer is functionalized with 4-nitrothiophenol (4-NTP) molecules.
Dependencies are inferred from the claim text.