CPC G01N 27/44791 (2013.01) [B01L 3/021 (2013.01); B01L 3/50273 (2013.01); B82Y 35/00 (2013.01); G01N 27/3277 (2013.01); G01N 27/4167 (2013.01); G01N 33/48721 (2013.01); G01Q 60/44 (2013.01); B01L 2300/0896 (2013.01)] | 20 Claims |
1. A nanopipette for measuring pH of a sample, the nanopipette comprising:
(a) a capillary portion defining an interior bore of the nanopipette leading to a nanopore;
(b) the interior bore adapted for containing therein an electrode and an interior solution communicating with an exterior solution through said nanopore; and
(c) a coating on an interior surface of the nanopore, the coating comprising:
(i) a polyelectrolyte layer bound directly to the interior surface; and
(ii) a chitosan molecule linked to the polyelectrolyte layer.
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