1
|
Chiam SL, Lim HN, Hafiz SM, Pandikumar A, Huang NM. Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets. Sci Rep 2018; 8:3093. [PMID: 29449631 PMCID: PMC5814563 DOI: 10.1038/s41598-018-21572-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/07/2018] [Indexed: 11/11/2022] Open
Abstract
The energy density of conventional supercapacitors is in the range of 6–10 Wh kg−1, which has restricted them from many applications that require devices with long durations. Herein, we report a method for enhancing the energy density of a device through the parallel stacking of five copper foils coated on each side with graphene nanoplatelets. Microporous papers immersed in 2 M aqueous sodium sulphate were used as separators. With a low contact resistance of 0.05 Ω, the supercapacitor yielded an optimum specific energy density and a specific power density of 24.64 Wh kg−1 and 402 W kg−1 at 0.8 V, respectively. The working potential was increased to 2.4 V when three of the supercapacitors were connected in series, forming a tandem device. Its potential for real applications was manifested by the ability to light up a light-emitting diode for 40 s after charging for 60 s.
Collapse
Affiliation(s)
- S L Chiam
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - H N Lim
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia. .,Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - S M Hafiz
- Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - A Pandikumar
- Electrochemical Materials Science and Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, India
| | - N M Huang
- New Energy Science & Engineering Programme, University of Xiamen Malaysia, Jalan SunSuria, Bandar SunSuria, 43900, Sepang, Selangor Darul Ehsan, Malaysia.
| |
Collapse
|
2
|
Haniff MASM, Hafiz SM, Huang NM, Rahman SA, Wahid KAA, Syono MI, Azid IA. Piezoresistive Effect in Plasma-Doping of Graphene Sheet for High-Performance Flexible Pressure Sensing Application. ACS Appl Mater Interfaces 2017. [PMID: 28418234 DOI: 10.1007/s10853-017-0861-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
This paper presents a straightforward plasma treatment modification of graphene with an enhanced piezoresistive effect for the realization of a high-performance pressure sensor. The changes in the graphene in terms of its morphology, structure, chemical composition, and electrical properties after the NH3/Ar plasma treatment were investigated in detail. Through a sufficient plasma treatment condition, our studies demonstrated that plasma-treated graphene sheet exhibits a significant increase in sensitivity by one order of magnitude compared to that of the unmodified graphene sheet. The plasma-doping introduced nitrogen (N) atoms inside the graphene structure and was found to play a significant role in enhancing the pressure sensing performance due to the tunneling behavior from the localized defects. The high sensitivity and good robustness demonstrated by the plasma-treated graphene sensor suggest a promising route for simple, low-cost, and ultrahigh resolution flexible sensors.
Collapse
Affiliation(s)
- M A S M Haniff
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - S M Hafiz
- Functional Device Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia , 43400 UPM Serdang, Selangor, Malaysia
| | - N M Huang
- Faculty of Engineering, Xiamen University of Malaysia , Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
| | - S A Rahman
- Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya , Kuala Lumpur 50603, Malaysia
| | - K A A Wahid
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - M I Syono
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - I A Azid
- Mechanical Section, Universiti Kuala Lumpur Malaysian Spanish Institute , Kulim Hi-TechPark, Kedah 09000, Malaysia
| |
Collapse
|
3
|
Haniff MASM, Hafiz SM, Huang NM, Rahman SA, Wahid KAA, Syono MI, Azid IA. Piezoresistive Effect in Plasma-Doping of Graphene Sheet for High-Performance Flexible Pressure Sensing Application. ACS Appl Mater Interfaces 2017; 9:15192-15201. [PMID: 28418234 DOI: 10.1021/acsami.7b02833] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
This paper presents a straightforward plasma treatment modification of graphene with an enhanced piezoresistive effect for the realization of a high-performance pressure sensor. The changes in the graphene in terms of its morphology, structure, chemical composition, and electrical properties after the NH3/Ar plasma treatment were investigated in detail. Through a sufficient plasma treatment condition, our studies demonstrated that plasma-treated graphene sheet exhibits a significant increase in sensitivity by one order of magnitude compared to that of the unmodified graphene sheet. The plasma-doping introduced nitrogen (N) atoms inside the graphene structure and was found to play a significant role in enhancing the pressure sensing performance due to the tunneling behavior from the localized defects. The high sensitivity and good robustness demonstrated by the plasma-treated graphene sensor suggest a promising route for simple, low-cost, and ultrahigh resolution flexible sensors.
Collapse
Affiliation(s)
- M A S M Haniff
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - S M Hafiz
- Functional Device Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia , 43400 UPM Serdang, Selangor, Malaysia
| | - N M Huang
- Faculty of Engineering, Xiamen University of Malaysia , Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
| | - S A Rahman
- Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya , Kuala Lumpur 50603, Malaysia
| | - K A A Wahid
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - M I Syono
- Advanced Devices Lab, MIMOS Berhad, Technology Park Malaysia , Kuala Lumpur 57000, Malaysia
| | - I A Azid
- Mechanical Section, Universiti Kuala Lumpur Malaysian Spanish Institute , Kulim Hi-TechPark, Kedah 09000, Malaysia
| |
Collapse
|
4
|
Sadri R, Zangeneh Kamali K, Hosseini M, Zubir N, Kazi SN, Ahmadi G, Dahari M, Huang NM, Golsheikh AM. Experimental study on thermo-physical and rheological properties of stable and green reduced graphene oxide nanofluids: Hydrothermal assisted technique. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2016.1234387] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Rad Sadri
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - K. Zangeneh Kamali
- College of Engineering and Computer Science, Australian National University, Canberra, Australia
| | - M. Hosseini
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Nashrul Zubir
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - S. N. Kazi
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Goodarz Ahmadi
- Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY, USA
| | - Mahidzal Dahari
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - N. M. Huang
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - A. M. Golsheikh
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
5
|
Mohammadpour E, Jiang ZT, Altarawneh M, Mondinos N, Rahman MM, Lim HN, Huang NM, Xie Z, Zhou ZF, Dlugogorski BZ. Experimental and predicted mechanical properties of Cr1−xAIxN thin films, at high temperatures, incorporating in situ synchrotron radiation X-ray diffraction and computational modelling. RSC Adv 2017. [DOI: 10.1039/c7ra00342k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cr1−xAlxN coatings, synthesised by an unbalanced magnetic sputtering system, showed improved microstructure and mechanical properties for ∼14–21% Al content.
Collapse
Affiliation(s)
- Ehsan Mohammadpour
- Surface Analysis and Materials Engineering Research Group
- School of Engineering & Information Technology
- Murdoch University
- Murdoch
- Australia
| | - Zhong-Tao Jiang
- Surface Analysis and Materials Engineering Research Group
- School of Engineering & Information Technology
- Murdoch University
- Murdoch
- Australia
| | | | - Nicholas Mondinos
- Surface Analysis and Materials Engineering Research Group
- School of Engineering & Information Technology
- Murdoch University
- Murdoch
- Australia
| | - M. Mahbubur Rahman
- Surface Analysis and Materials Engineering Research Group
- School of Engineering & Information Technology
- Murdoch University
- Murdoch
- Australia
| | - H. N. Lim
- Department of Chemistry
- Faculty of Science
- University Putra Malaysia
- 43400 UPM Serdang
- Malaysia
| | - N. M. Huang
- Faculty of Engineering
- Xiamen University of Malaysia
- 43900 Sepang
- Malaysia
| | - Zonghan Xie
- School of Mechanical Engineering
- University of Adelaide
- Australia
| | - Zhi-feng Zhou
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- Kowloon
- China
| | | |
Collapse
|
6
|
Foo CY, Lim HN, Pandikumar A, Huang NM, Ng YH. Utilization of reduced graphene oxide/cadmium sulfide-modified carbon cloth for visible-light-prompt photoelectrochemical sensor for copper (II) ions. J Hazard Mater 2016; 304:400-408. [PMID: 26595899 DOI: 10.1016/j.jhazmat.2015.11.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/27/2015] [Accepted: 11/04/2015] [Indexed: 06/05/2023]
Abstract
A newly developed CdS/rGO/CC electrode was prepared based on a flexible carbon cloth (CC) substrate with cadmium sulfide (CdS) nanoparticles and reduced graphene oxide (rGO). The CdS was synthesized using an aerosol-assisted chemical vapor deposition (AACVD) method, and the graphene oxide was thermally reduced on the modified electrode surface. The existence of rGO in the CdS-modified electrode increased the photocurrent intensity of the CdS/rGO/CC-modified electrode by three orders of magnitude, compared to that of the CdS/ITO electrode and two orders of magnitude higher than the CdS/CC electrode. A new visible-light-prompt photoelectrochemical sensor was developed based on the competitive binding reaction of Cu(2+) and CdS on the electrode surface. The results showed that the effect of the Cu(2+) on the photocurrent response was concentration-dependent over the linear ranges of 0.1-1.0 μM and 1.0-40.0 μM with a detection limit of 0.05 μM. The results of a selectivity test showed that this modified electrode has a high response toward Cu(2+) compared to other heavy metal ions. The proposed CdS/rGO/CC electrode provided a significantly high potential current compared to other reported values, and could be a practical tool for the fast, sensitive, and selective determination of Cu(2+).
Collapse
Affiliation(s)
- C Y Foo
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - H N Lim
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Functional Device Laboratory, Institute of Advance Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - A Pandikumar
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - N M Huang
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Y H Ng
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, NSW 2052, Australia
| |
Collapse
|
7
|
Golsheikh AM, Lim HN, Zakaria R, Huang NM. Sonochemical synthesis of reduced graphene oxide uniformly decorated with hierarchical ZnS nanospheres and its enhanced photocatalytic activities. RSC Adv 2015. [DOI: 10.1039/c4ra14775h] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Reduced graphene oxide decorated with ZnS nanospheres was synthesized through the simple ultrasonic irradiation route which shows a significant enhancement in the photocatalytic degradation of methylene blue compared to the bare ZnS particles.
Collapse
Affiliation(s)
- A. Moradi Golsheikh
- Low Dimensional Materials Research Centre (LDMRC)
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
| | - H. N. Lim
- Department of Chemistry
- Faculty of Science
- University Putra Malaysia
- 43400 UPM Serdang
- Malaysia
| | - Rozalina Zakaria
- Photonics Research Centre
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
| | - N. M. Huang
- Low Dimensional Materials Research Centre (LDMRC)
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
| |
Collapse
|
8
|
Abstract
Graphene-based nanofillers and their applications. Fabrication methods of graphene-based nanocomposites. Interaction and dispersion of graphene-based fillers in polymer matrices. Current trends and prospects of graphene-based nanocomposites.
Collapse
Affiliation(s)
- W. K. Chee
- Department of Chemistry
- Faculty of Science
- Universiti Putra Malaysia
- Malaysia
| | - H. N. Lim
- Department of Chemistry
- Faculty of Science
- Universiti Putra Malaysia
- Malaysia
- Functional Device Laboratory
| | - N. M. Huang
- Low Dimension Materials Research Centre
- Department of Physics
- Faculty of Science
- University of Malaya
- Kuala Lumpur 50603
| | - I. Harrison
- Faculty of Engineering
- The University of Nottingham Malaysia Campus
- Malaysia
| |
Collapse
|
9
|
Lee CF, Lim HN, Chee WK, Pandikumar A, Huang NM. Facile Synthesis of Graphene via Direct Water-Sodium Dodecylbenzenesulfonate Exfoliation. ACTA ACUST UNITED AC 2014. [DOI: 10.1166/graph.2014.1030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Lim WH, Yap YK, Chong WY, Pua CH, Huang NM, De La Rue RM, Ahmad H. Graphene oxide-based waveguide polariser: from thin film to quasi-bulk. Opt Express 2014; 22:11090-11098. [PMID: 24921807 DOI: 10.1364/oe.22.011090] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have demonstrated a broadband waveguide polariser with high extinction ratio on a polymer optical waveguide coated with graphene oxide via the drop-casting method. The highest extinction ratio of nearly 40 dB is measured at 1590 nm, with a variation of 4.5 dB across a wavelength range from 1530 nm to 1630 nm, a ratio that is (to our knowledge) the highest reported for graphene-based waveguide polarisers to date. This result is achieved with a graphene oxide coating length along the propagation direction of only 1.3 mm and a bulk film thickness of 2.0 µm. The underlying principles of the strongly polarisation dependent propagation loss demonstrated have been studied and are attributed to the anisotropic complex dielectric function of graphene oxide bulk film.
Collapse
|
11
|
Golsheikh AM, Huang NM, Lim HN, Zakaria R. One-pot sonochemical synthesis of reduced graphene oxide uniformly decorated with ultrafine silver nanoparticles for non-enzymatic detection of H2O2 and optical detection of mercury ions. RSC Adv 2014. [DOI: 10.1039/c4ra05998k] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The ultrasonic irradiation of an aqueous solution containing a silver ammonia complex (Ag(NH3)2OH) and graphene oxide (GO) is a simple strategy for producing GO uniformly decorated with ultrafine AgNPs.
Collapse
Affiliation(s)
- A. Moradi Golsheikh
- Low Dimensional Materials Research Centre (LDMRC)
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - N. M. Huang
- Low Dimensional Materials Research Centre (LDMRC)
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - H. N. Lim
- Department of Chemistry
- Faculty of Science
- University Putra Malaysia
- 43400 UPM Serdang, Malaysia
| | - Rozalina Zakaria
- Photonics Research Centre
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| |
Collapse
|
12
|
Abd Wahab F, Sulaiman K, Huang NM. Synthesis of Graphene Sheets and Characterization of Poly(3-hexylthiophene):Graphene Blends. Journal of Elec Materi 2013; 42:2739-2742. [DOI: 10.1007/s11664-013-2648-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
13
|
Lim YS, Tan YP, Lim HN, Huang NM, Tan WT. Preparation and characterization of polypyrrole/graphene nanocomposite films and their electrochemical performance. J Polym Res 2013. [DOI: 10.1007/s10965-013-0156-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
Lim YS, Tan YP, Lim HN, Tan WT, Mahnaz MA, Talib ZA, Huang NM, Kassim A, Yarmo MA. Polypyrrole/graphene composite films synthesized via potentiostatic deposition. J Appl Polym Sci 2012. [DOI: 10.1002/app.38174] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
15
|
Abstract
Graphene has attracted much attention from researchers due to its interesting mechanical, electrochemical, and electronic properties. It has many potential applications such as polymer filler, sensor, energy conversion, and energy storage devices. Graphene-based nanocomposites are under an intense spotlight amongst researchers. A large amount of graphene is required for preparation of such samples. Lately, graphene-based materials have been the target for fundamental life science investigations. Despite graphene being a much sought-after raw material, the drawbacks in the preparation of graphene are that it is a challenge amongst researchers to produce this material in a scalable quantity and that there is a concern about its safety. Thus, a simple and efficient method for the preparation of graphene oxide (GO) is greatly desired to address these problems. In this work, one-pot chemical oxidation of graphite was carried out at room temperature for the preparation of large-area GO with ~100% conversion. This high-conversion preparation of large-area GO was achieved using a simplified Hummer’s method from large graphite flakes (an average flake size of 500 μm). It was found that a high degree of oxidation of graphite could be realized by stirring graphite in a mixture of acids and potassium permanganate, resulting in GO with large lateral dimension and area, which could reach up to 120 μm and ~8000 μm2, respectively. The simplified Hummer’s method provides a facile approach for the preparation of large-area GO.
Collapse
Affiliation(s)
- N M Huang
- Low Dimensional Materials Research Centre, Physics Department, University of Malaya, Kuala Lumpur, Malaysia.
| | | | | | | | | |
Collapse
|
16
|
Lim HN, Huang NM, Lim SS, Harrison I, Chia CH. Fabrication and characterization of graphene hydrogel via hydrothermal approach as a scaffold for preliminary study of cell growth. Int J Nanomedicine 2011; 6:1817-23. [PMID: 21931479 PMCID: PMC3173046 DOI: 10.2147/ijn.s23392] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Three-dimensional assembly of graphene hydrogel is rapidly attracting the interest of researchers because of its wide range of applications in energy storage, electronics, electrochemistry, and waste water treatment. Information on the use of graphene hydrogel for biological purposes is lacking, so we conducted a preliminary study to determine the suitability of graphene hydrogel as a substrate for cell growth, which could potentially be used as building blocks for biomolecules and tissue engineering applications. METHODS A three-dimensional structure of graphene hydrogel was prepared via a simple hydrothermal method using two-dimensional large-area graphene oxide nanosheets as a precursor. RESULTS The concentration and lateral size of the graphene oxide nanosheets influenced the structure of the hydrogel. With larger-area graphene oxide nanosheets, the graphene hydrogel could be formed at a lower concentration. X-ray diffraction patterns revealed that the oxide functional groups on the graphene oxide nanosheets were reduced after hydrothermal treatment. The three-dimensional graphene hydrogel matrix was used as a scaffold for proliferation of a MG63 cell line. CONCLUSION Guided filopodia protrusions of MG63 on the hydrogel were observed on the third day of cell culture, demonstrating compatibility of the graphene hydrogel structure for bioapplications.
Collapse
Affiliation(s)
- HN Lim
- Centre for Ionics University of Malaya, Physics Department, Faculty of Science, University of Malaya, Kuala Lumpur
| | - NM Huang
- Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, Kuala Lumpur
| | - SS Lim
- School of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor
| | - I Harrison
- School of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor
| | - CH Chia
- School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Selangor, Malaysia
| |
Collapse
|
17
|
Lim HN, Kassim A, Huang NM, Yarmo MA, Khiew PS, Chiu WS. Preparation and characterization of brushite crystals using high internal phase emulsion. Colloid J 2009. [DOI: 10.1134/s1061933x09060088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
18
|
Lim HN, Kassim A, Huang NM, Radiman S, Yarmo MA, Yeong SK, Khiew PS, Chiu WS. Three-Component Olive Oil-In-Water High Internal Phase Emulsions Stabilized by Palm Surfactant and Their Moisturizing Properties. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690903107331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|