In another case, researchers report that bismuth telluride has high electrical conductivity of 1.1?0 5 S�m / m 2 with its very low lattice thermal conductivity of 1.20 W / ( m�K ), similar to ordinary glass.
12.
The use of oxygen plasma as a cleaning agent, an established procedure for use with other graphene-inspired methods, is inviable for use with bismuth telluride; it oxidizes the sample, resulting in fractures as well as a rough, uneven surface.
13.
In one such instance n-type bismuth telluride was shown to have an improved Seebeck coefficient ( voltage per unit temperature difference ) of " 287 ?V / K at 54 Celsius, However, one must realize that Seebeck Coefficient and electrical conductivity have a tradeoff; a higher Seebeck coefficient results in decreased carrier concentration and decreased electrical conductivity.
