Donghee Son, Sung Young Park, Byeongju Kim, Jun Tae Koh, Tae Hyun Kim, Sangmin An, Doyoung Jang, Gyu Tae Kim, Wonho Jhe and Seunghun Hong, ”Nanoneedle Transistor-Based Sensors for the Selective Detection of Intracellular Calcium Ions”, ACS Nano 5 (5), 3888-3895 (2011)