TY - JOUR PB - American Physical Society ID - 10.1103/PhysRevFocus.27.25 TI - Weighing DNA Down to the Zeptogram JF - Physical Review Focus JA - Phys. Rev. Focus J1 - FOCUS VL - 27 IS - SP - 25 EP - PY - 2011/06/24/ UR - http://link.aps.org/doi/10.1103/PhysRevFocus.27.25 A1 - Harris, David ER -