SEARCH Articles Figures Tables Langmuir balance device Langmuir-Blodgett devices Langmuir-Blodgett devices conductivity Langmuir-Blodgett devices insulator Langmuir-Blodgett devices layers Langmuir-Blodgett devices metal Langmuir-Blodgett devices semiconductor Langmuir-Blodgett films nonlinear optical devices