TY - JOUR AU - Helmerson, Kristian AU - Kishore, R AU - Phillips, W AU - Weetall, H C2 - Clinical Chemistry DA - 1997-02-01 00:02:00 LA - en M1 - 43 PB - Clinical Chemistry PY - 1997 TI - Optical Tweezers-Based Immunosensor Detects Femtomolar Concentrations of Antigens ER -