pH-Sensitive Nanogel Possessing Reactive PEG Tethered Chains on the Surface Hayashi, Hisato ; Iijima, Michihiro ; Kataoka, Kazunori ; Nagasaki, Yukio Abstract Publication: Macromolecules Pub Date: July 2004 DOI: 10.1021/ma049199g Bibcode: 2004MaMol..37.5389H