Yuko S. Yamamoto, Katsuyuki Hasegawa, Yuki Hasegawa, Yasutaka Kitahama, Satoshi Fukuoka, Norio Murase, Yoshinobu Baba, Yukihiro Ozaki, and Tamitake Itoh, On-demand Production of Highly Reproducible SERS Substrates Made of Silver Nanohexagonal Columns via Galvanic Displacement, PCCP, in press.