Next Article in Journal
Disturbing-Free Determination of Yeast Concentration in DI Water and in Glucose Using Impedance Biochips
Previous Article in Journal
Acknowledgement to Reviewers of Biosensors in 2019
Open AccessArticle

High-Yield Production of Aqueous Graphene for Electrohydrodynamic Drop-on-Demand Printing of Biocompatible Conductive Patterns

1
Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
2
Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, USA
*
Author to whom correspondence should be addressed.
Biosensors 2020, 10(1), 6; https://doi.org/10.3390/bios10010006
Received: 6 December 2019 / Revised: 8 January 2020 / Accepted: 15 January 2020 / Published: 17 January 2020
Presented here is a scalable and aqueous phase exfoliation of graphite to high yield and quality of few layer graphene (FLG) using Bovine Serum Albomine (BSA) and wet ball milling. The produced graphene ink is tailored for printable and flexible electronics, having shown promising results in terms of electrical conductivity and temporal stability. Shear force generated by steel balls which resulted in 2–3 layer defect-free graphene platelets with an average size of hundreds of nm, and with a concentration of about 5.1 mg/mL characterized by Raman spectroscopy, atomic force microscopy (AFM), transmittance electron microscopy (TEM) and UV-vis spectroscopy. Further, a conductive ink was prepared and printed on flexible substrate (Polyimide) with controlled resolution. Scanning electron microscopy (SEM) and Profilometry revealed the effect of thermal annealing on the prints to concede consistent morphological characteristics. The resulted sheet resistance was measured to be R s   =   36.75   Ω / sqr for prints as long as 100 mm. Printable inks were produced in volumes ranging from 20 mL to 1 L, with potential to facilitate large scale production of graphene for applications in biosensors, as well as flexible and printable electronics. View Full-Text
Keywords: graphene; inkjet printing; conductive ink; flexible electronics; neuronal sensing graphene; inkjet printing; conductive ink; flexible electronics; neuronal sensing
Show Figures

Graphical abstract

MDPI and ACS Style

Niaraki Asli, A.E.; Guo, J.; Lai, P.L.; Montazami, R.; Hashemi, N.N. High-Yield Production of Aqueous Graphene for Electrohydrodynamic Drop-on-Demand Printing of Biocompatible Conductive Patterns. Biosensors 2020, 10, 6.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop