TY - JOUR T1 - Direct imaging of polyethylene films at single-chain resolution with torsional tapping atomic force microscopy JO - Physical Review Letters PY - 2011/01/01 AU - Mullin N AU - Hobbs JK ED - DO - DOI: 10.1103/PhysRevLett.107.197801 VL - 107 IS - 19 Y2 - 2024/12/22 ER -