US 12,135,290 B2
Method for making an SERS electrode
Mohammad Kamal Hossain, Dhahran (SA); and Qasem Ahmed Drmosh, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Jun. 10, 2024, as Appl. No. 18/738,120.
Application 18/738,120 is a continuation of application No. 17/894,271, filed on Aug. 24, 2022, granted, now 12,031,918.
Prior Publication US 2024/0328956 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/65 (2006.01); B82Y 30/00 (2011.01); C23C 14/18 (2006.01); C23C 14/58 (2006.01); G01N 33/543 (2006.01)
CPC G01N 21/658 (2013.01) [B82Y 30/00 (2013.01); C23C 14/185 (2013.01); C23C 14/5806 (2013.01); G01N 33/5438 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of making a surface-enhanced Raman scattering-active electrode, comprising:
depositing a porous oxide layer onto a solid support to form a first oxide-coated support;
depositing a layer of a noble metal onto the first oxide-coated support to form a second-coated support; and
annealing the second-coated support at 400 to 800° C. to form the surface-enhanced Raman scattering-active electrode,
wherein the surface-enhanced Raman scattering-active electrode, comprises:
the solid support;
the porous oxide layer, wherein the porous oxide layer comprises transition metal oxide nanoparticles present on a surface of the solid support and has a mean pore size of 2 to 30 nm, wherein the transition metal oxide nanoparticles comprise nanoparticles of at least one selected from the group consisting of barium titanate, strontium titanate, lithium niobate and lanthanum calcium manganite; and
at least one of noble metal nanoneedles and noble metal nanorings present on the porous oxide layer;
wherein the noble metal nanoneedles have an average length of 350-800 nm, a flat end with an average width in a range of 100-150 nm, and a pointed end; and
wherein the noble metal nanorings have a thickness of 50-300 nm and are present in the form of annular clusters having elliptical shapes with an average diameter in a range of 35-60 nm.