Microscopy and tunable resistive pulse sensing characterization of the swelling of pH-responsive, polymeric expansile nanoparticles.
Microscopy and tunable resistive pulse sensing characterization of the swelling of pH-responsive, polymeric expansile nanoparticles.
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DOI:
10.1039/c3nr00114h
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发表时间:
2013-04-21
期刊:
影响因子:
6.7
通讯作者:
Grinstaff MW
中科院分区:
文献类型:
--
作者:
Colby AH;Colson YL;Grinstaff MW
Polymeric expansile nanoparticles (eNPs) that respond to a mildly acidic environment by swelling with water and expanding 2–10 X in diameter represent a new responsive drug delivery system. Here, we use a variety of techniques to characterize the pH- and time-dependence of eNP swelling as this is a key property responsible for the observed in vitro and in vivo performance of eNPs. Results demonstrate a significant change in eNP volume (>350 X) at pH 5.0 as seen using: scanning electron microscopy (SEM), conventional transmission electron microscopy (TEM), freeze-fracture transmission electron microscopy (ff-TEM), fluorescence microscopy, and a new nanopore based characterization technology, the qNano, which measures both individual particle size as well as overall particle concentration in situ using tunable resistive pulse sensing. eNP swelling occurs in a continuous and yet heterogeneous manner over several days and is pH dependent.
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影响因子:
14
作者:
Liu, Rong;Gilmore, Denis M.;Zubris, Kimberly Ann V.;Xu, Xiaoyin;Catalano, Paul J.;Padera, Robert F.;Grinstaff, Mark W.;Colson, Yolonda L.
通讯作者:
Colson, Yolonda L.
影响因子:
5.1
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Griset, Aaron P.;Walpole, Joseph;Grinstaff, Mark W.
通讯作者:
Grinstaff, Mark W.
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作者:
Colson, Yolonda L.;Liu, Rong;Grinstaff, Mark W.
通讯作者:
Grinstaff, Mark W.
影响因子:
1.6
作者:
Kozak, Darby;Anderson, Will;Trau, Matt
通讯作者:
Trau, Matt