Copolymer FrictionalForceMicroscopy electrospinning Lanthanum_aluminate Fujian PvdfBead IcelandSpar Graphite Kevlar Monisha LFM DiffractiveOpticalElements DLaTGS Logo Cross-section ULCA Scratch pinpoint mode ForceVolumeImage nanomechanical SolarCell Typhimurium Mechanical&nanotechnology thermal_conductivity UnivOfMaryland SoftSample MembraneFilter heterojunctions KPFM flakes HighAcpectRatio LiBattery PhaseImaging Array HBN