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[求助] zif-8/HA 透明質酸

合成好zif-8再coating HA,為何表面電位已經為-16.8mV,表示HA有上去,怎麼在PBS還會析出成絮狀呢? ZIF-8 莫耳比1:10(Zn(NO3)2=17mg, 2-MIM=47mg)在甲醇反應10min,離心純化完,分散回DI water(DLS約為120nm SEM約為50nm), 再和HA 水溶液反應(HA=2mg/mL) 16hr, 離心純化時用water wash 2次,用12000rpm離心,分散回DI water 保存,溶液過一陣子也會沉澱…哪裡出問題了,離心水洗有特別的技巧嗎? (因為離心前後在PB buffer 測size就會有差異了)
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