Abstract: The present invention relates to a device, comprising at least one layer of an active material having a first optical thickness, the active material being selected so as to experience a change (i) of at least one size dimension, (ii) of the resistance, (iii) of the refractive index or (iv) combinations of two or more of the foregoing, when the active material is subjected to a change in environment, wherein at least one and preferably all of the layers of the at least one layer of the active material is composed of at least two nanosheets of the active material, with the at least two nanosheets randomly overlapping one another. The invention further relates to a nanosheet of active material and to a use of the nanosheet of the material.

Abstract: The present invention relates to a device, comprising at least one layer of an active material having a first optical thickness, the active material being selected so as to experience a change (i) of at least one size dimension, (ii) of the resistance, (iii) of the refractive index or (iv) combinations of two or more of the foregoing, when the active material is subjected to a change in environment, wherein at least one and preferably all of the layers of the at least one layer of the active material is composed of at least two nanosheets of the active material, with the at least two nanosheets randomly overlapping one another. The invention further relates to a nanosheet of active material and to a use of the nanosheet of the material.

Abstract: A nucleoside phosphate may be separated from a solution containing it using the ability of the nucleoside phosphate to intercalate into a layered double hydroxide. In particular, a first nucleoside phosphate may be separated from a second nucleoside phosphate by treating a solution containing the first and second nucleoside phosphates with a layered double hydroxide to preferentially intercalate the first nucleoside phosphate into the layered double hydroxide. The layered double hydroxide containing the intercalated nucleoside phosphate may be subsequently treated to recover the nucleoside phosphate. The methods disclosed provide useful procedures whereby nucleoside phosphates of enhanced purity may be obtained.