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Mesoporous polyaniline nanofiber decorated graphene micro-flowers for enzyme-less cholesterol biosensors
| Content Provider | Scilit |
|---|---|
| Author | Lakshmi, G. B. V. S. Sharma, Anshu Solanki, Pratima R. Avasthi, D. K. |
| Copyright Year | 2016 |
| Description | Journal: Nanotechnology In the present work, we have studied a nanocomposite of polyaniline nanofiber-graphene microflowers (PANInf-GMF), prepared by an in situ rapid mixing polymerization method. The structural and morphological studies of the nanocomposite (PANInf-GMF) were carried out by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared (FTIR) and Raman spectroscopy. The mesoporous, nanofibrous and microflower structures were observed by scanning electron microscopy. The functional groups and synergetic effects were observed by FTIR and micro-Raman measurements. The water wettability was carried out by a contact angle measurement technique and found to be super hydrophilic in nature towards water. This nanocomposite was deposited onto indium-tin-oxide coated glass substrate by a drop casting method and used for the detection of cholesterol using an electrochemical technique. The differential pulse voltammetry studies show the appreciable increase in the current with the addition of 1.93 to 464.04 mg $dl^{−1}$ cholesterol concentration. It is also found that the electrodes were highly selective towards cholesterol when compared to other biological interfering analytes, such as glucose, urea, citric acid, cysteine and ascorbic acid. The sensitivity of the sensor is estimated as 0.101 μA $mg^{−1}$ dl $cm^{−2}$ and the lower detection limit as 1.93 mg $dl^{−1}$. This work will throw light on the preparation of non-enzymatic biosensors based on PANInf-carbon nanostructure composites. |
| Related Links | http://iopscience.iop.org/article/10.1088/0957-4484/27/34/345101/pdf |
| ISSN | 09574484 |
| e-ISSN | 13616528 |
| DOI | 10.1088/0957-4484/27/34/345101 |
| Journal | Nanotechnology |
| Issue Number | 34 |
| Volume Number | 27 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2016-07-15 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nanotechnology Raman Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering |
