“…Zwitterionic polymers, which have both anion and cation in a single molecule, are known as excellent bio-functional materials that prevent both cell adhesion and protein adsorption [17,18] , and are also useful for bio-patterning [19,20] . In this work, zwitterionic polymers were prepared using 1-carboxy-N,Ndimethyl-N-(2'-methacryloyloxyethyl)methanaminium inner salt also known as carboxymethyl betaine (CMB) was kindly donated from Osaka Organic Chemical Industry, Kashiwara, Japan, and n-butylmethacrylate (BMA) obtained from Wako, Osaka, Japan, at the rate of (CMB/BMA = 29/71; MW = 193 kDa and MW/Mn =1.92; 1 wt% ethanol solution), and utilized as a surface patterning material.…”