Technology: general issues 15 Van der Waals forces 6 Research & information: general 5 History of engineering and technology 4 Physics 4 Van der Waal 4 Graphene 3 III-V semiconductors 3 Selenium compounds 3 Charge transfer 2 Chemistry 2 Ferroelectric materials 2 Ferroelectricity 2 Ferroelectrics materials 2 History of engineering & technology 2 Nickel compounds 2 Niobium compounds 2 Nonvolatile 2 Polarization 2 Quantum theory 2 Sensor 2 Two-dimensional 2 Van der waal heterostructure 2 graphene 2 heterostructure 2 van der Waals heterostructures 2 2-dimensional electron gas 1 2D materials 1 2d material 1 3-D nanostructures 1