Highly Sensitive Electrochemical Determination of Norepinephrine Using Poly Acrylic Acid‐Coated Nanoceria

2019 ◽  
Vol 6 (17) ◽  
pp. 4666-4673 ◽  
Author(s):  
Seong Eun Son ◽  
Euna Ko ◽  
Van‐Khue Tran ◽  
Won Hur ◽  
Hyun Choi ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Electrochemical Determination ◽  
Highly Sensitive ◽  
Poly Acrylic Acid

A poly(acrylic acid)-modified copper-organic framework for electrochemical determination of vancomycin

2020 ◽  
Vol 187 (1) ◽  
Author(s):  
Atal A. S. Gill ◽  
Sima Singh ◽  
Nikhil Agrawal ◽  
Zondi Nate ◽  
Tirivashe E. Chiwunze ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Electrochemical Determination ◽  
Organic Framework ◽  
Poly Acrylic Acid

Highly sensitive BEHP-co-MEH:PPV + Poly(acrylic acid) partial sodium salt based relative humidity sensor

2017 ◽  
Vol 246 ◽  
pp. 809-818 ◽  
Author(s):  
Memoon Sajid ◽  
Hyun Bum Kim ◽  
Young Jin Yang ◽  
Jeongdai Jo ◽  
Kyung Hyun Choi
Keyword(s):  
Relative Humidity ◽  
Acrylic Acid ◽  
Sodium Salt ◽  
Humidity Sensor ◽  
Highly Sensitive ◽  
Relative Humidity Sensor ◽  
Poly Acrylic Acid

scholarly journals The Anomalous Influence of Polyelectrolyte Concentration on the Deposition and Nanostructure of Poly(ethyleneimine)/Poly(acrylic acid) Multilayers

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2141 ◽  
Author(s):  
Martin Müller
Keyword(s):  
Acrylic Acid ◽  
Attenuated Total Reflection ◽  
Silicon Substrates ◽  
Acid Base ◽  
Exponential Relationship ◽  
Individual Adsorption ◽  
The Individual ◽  
Poly Acrylic Acid

The deposition and nanostructure of polyelectrolyte (PEL) multilayers (PEMs) of branched poly(ethyleneimine)/poly(acrylic acid) (PEI/PAA) onto silicon substrates was studied in terms of the dependence of pH and the PEL concentration (cPEL) in the individual adsorption steps z. Both a commercial automatic dipping device and a homebuilt automatic stream coating device (flow cell) were used. Gravimetry, SFM, transmission (TRANS) and in situ attenuated total reflection (ATR) FTIR spectroscopy were used for the quantitative determination of the adsorbed amount, thickness, chemical composition and morphology of deposited PEMs, respectively. Firstly, the combination of pH = 10 for PEI and pH = 4 for PAA, where both PEL were predominantly in the neutral state, resulted in an extraordinarily high PEM deposition, while pH combinations, where one PEL component was charged, resulted in a significantly lower PEM deposition. This was attributed to both PEL conformation effects and acid/base interactions between basic PEI and acidic PAA. Secondly, for that pH combination an exponential relationship between PEM thickness and adsorption step z was found. Thirdly, based on the results of three independent methods, the course of the deposited amount of a PEM-10 (z = 10) versus cPEL in the range 0.001 to 0.015 M at pH = 10/4 was non-monotonous showing a pronounced maximum at cPEL = 0.005 M. Analogously, for cPEL = 0.005 M a maximum of roughness and structure size was found. Fourthly, related to that finding, in situ ATR-FTIR measurements gave evidence for the release of outermost located PEI upon PAA immersion (even step) and of outermost PAA upon PEI immersion (odd step) under formation of PEL complexes in solution. These studies help us to prepare PEL-based films with a defined thickness and morphology for interaction with biofluids in the biomedical and food fields.

Poly(acrylic acid)-Grafted Fluoropolymer Films for Highly Sensitive Fluorescent Bioassays

2013 ◽  
Vol 5 (6) ◽  
pp. 2155-2160 ◽  
Author(s):  
Chan-Hee Jung ◽  
In-Tae Hwang ◽  
In-Seol Kuk ◽  
Jae-Hak Choi ◽  
Byung-Keun Oh ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Highly Sensitive ◽  
Fluoropolymer Films ◽  
Poly Acrylic Acid

Highly sensitive electrochemical determination of 1-naphthol based on high-index facet SnO2 modified electrode

2012 ◽  
Vol 83 ◽  
pp. 478-484 ◽  
Author(s):  
Xiaofeng Huang ◽  
Guohua Zhao ◽  
Meichuan Liu ◽  
Fengting Li ◽  
Junlian Qiao ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Electrochemical Determination ◽  
High Index ◽  
Highly Sensitive
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