A method of three-dimensionally printing an article the method comprising: providing a composite material having first and second major surfaces, the composite material comprising: a composition having first and second major surfaces, the composition comprising: (i) a binder, and (ii) a mixture of nanoparticles in a range from 80 wt.% to 99.9 wt.%, based on the total weight of the composition, wherein 10 wt.% to 50 wt.% of the nanoparticles have an average particle diameter in a range from 2 nm to 200 nm and 50 wt.% to 90 wt.% of the nanoparticles have an average particle diameter in a range from 60 nm to 400 nm, and wherein the ratio of average particle diameter of nanoparticles having an average particle diameter in the range from 2 nm to 200 nm to average particle diameter of nanoparticles having an average particle diameter in the range from 60 nm to 400 nm is in a range from 1:1 to 1:200; and a thermoplastic layer having first and second major surfaces, wherein the second major surface of the thermoplastic layer is disposed on the first major surface of the composition; and three-dimensionally printing the article onto the first major surface of the thermoplastic layer . providing a composite material having first and second major surfaces, the composite material comprising: a composition having first and second major surfaces, the composition comprising: (i) a binder, and (ii) a mixture of nanoparticles in a range from 80 wt.% to 99.9 wt.%, based on the total weight of the composition, wherein 10 wt.% to 50 wt.% of the nanoparticles have an average particle diameter in a range from 2 nm to 200 nm and 50 wt.% to 90 wt.% of the nanoparticles have an average particle diameter in a range from 60 nm to 400 nm, and wherein the ratio of average particle diameter of nanoparticles having an average particle diameter in the range from 2 nm to 200 nm to average particle diameter of nanoparticles having an average particle diameter in the range from 60 nm to 400 nm is in a range from 1:1 to 1:200; and a thermoplastic layer having first and second major surfaces, wherein the second major surface of the thermoplastic layer is disposed on the first major surface of the composition; and a composition having first and second major surfaces, the composition comprising: (i) a binder, and (ii) a mixture of nanoparticles in a range from 80 wt.% to 99.9 wt.%, based on the total weight of the composition, wherein 10 wt.% to 50 wt.% of the nanoparticles have an average particle diameter in a range from 2 nm to 200 nm and 50 wt.% to 90 wt.% of the nanoparticles have an average particle diameter in a range from 60 nm to 400 nm, and wherein the ratio of average particle diameter of nanoparticles having an average particle diameter in the range from 2 nm to 200 nm to average particle diameter of nanoparticles having an average particle diameter in the range from 60 nm to 400 nm is in a range from 1:1 to 1:200; and a thermoplastic layer having first and second major surfaces, wherein the second major surface of the thermoplastic layer is disposed on the first major surface of the composition; and (i) a binder, and (ii) a mixture of nanoparticles in a range from 80 wt.% to 99.9 wt.%, based on the total weight of the composition, wherein 10 wt.% to 50 wt.% of the nanoparticles have an average particle diameter in a range from 2 nm to 200 nm and 50 wt.% to 90 wt.% of the nanoparticles have an average particle diameter in a range from 60 nm to 400 nm, and wherein the ratio of average particle diameter of nanoparticles having an average particle diameter in the range from 2 nm to 200 nm to average particle diameter of nanoparticles having an average particle diameter in the range from 60 nm to 400 nm is in a range from 1:1 to 1:200; and three-dimensionally printing the article onto the first major surface of the thermoplastic layer . <EOS>