Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2018 Oct 8;18(10):3358. doi: 10.3390/s18103358

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Top-view scanning electron micrographs (SEM) of PDEA hydrogel films on the GC electrode surface in NaCl solutions with pH 9.0 (a) containing no Na₂SO₄ and methanol at 25 °C, (b) containing 0.35 M Na₂SO₄ but no methanol at 25 °C, (c) containing no Na₂SO₄ and methanol at 40 °C, and (d) containing 20% methanol at 25 °C.