Novel electrochemical sensor based on functionalized graphene for simultaneous determination of adenine and guanine in DNA

Huang, Ke‐Jing; Niu, De-Jun; Sun, Junyong; Han, Chuan; Wu, Zeyi; Li, Yanli; Xiong, Xiang

doi:10.1016/j.colsurfb.2010.10.014

Cited by 238 publications

(120 citation statements)

References 32 publications

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“…Therefore, the guanine and adenine could be determined simultaneously from a mixture in large concentration domains by the proposed method. The linear detection range for both A and G is 0.5-200 M, which is much wider than the previously reported electrochemical sensors [34][35][36][37][38][39]. The detection limit (S/N = 3) for A and G was calculated to be 0.10 M and 0.15 M, respectively.…”

Section: Determination Of Adenine and Guaninementioning

confidence: 66%

“…However, adenine and guanine exhibit slow direct electron transfer and irreversible absorption on the electrode surface, which lead to low sensitivity for DNA detection. Over the past years, considerable efforts have been paid on the development of chemical modified electrodes to improve the electrochemical sensing performance for guanine and adenine [31][32][33][34][35][36][37][38][39]. Most recently, Dong and coworkers revealed that the free base of DNA have enhanced electrochemical reactivity at the graphene modified glassy carbon electrode [10].…”

Section: Introductionmentioning

confidence: 99%

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TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

Fan

Huang

Niu

et al. 2011

Electrochimica Acta

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189

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a b s t r a c tTiO 2 -graphene nanocomposite was prepared by hydrolysis of titanium isopropoxide in colloidal suspension of graphene oxide and in situ hydrothermal treatment. It provides an efficient and facile approach to yield nanocomposite with TiO 2 nanoparticles uniformly embedded on graphene substrate. The electrochemical behavior of adenine and guanine at the TiO 2 -graphene nanocomposite modified glassy carbon electrode was investigated. The results show that the incorporation of TiO 2 nanoparticles with graphene significantly improved the electrocatalytic activity and voltammetric response towards these species comparing with that at the graphene film. The TiO 2 -graphene based electrochemical sensor exhibits wide linear range of 0.5-200 M with detection limit of 0.10 and 0.15 M for adenine and guanine detection, respectively. The excellent performance of this electrochemical sensor can be attributed to the high adsorptivity and conductivity of TiO 2 -graphene nanocomposite, which provides an efficient microenvironment for electrochemical reaction of these purine bases.

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Section: Determination Of Adenine and Guaninementioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

Fan

Huang

Niu

et al. 2011

Electrochimica Acta

Self Cite

189

View full text Add to dashboard Cite

show abstract

“…These properties promise attractive applications of graphene as a basis for novel nanomaterials possessing improved mechanical, electric and thermal physical characteristics or as highly efficient gas [8,9] and biological [10,11] At present thermal reduction is one of the most practiced techniques of preparing graphene-type materials on a commercial scale. Thermally reduced graphene oxide (TRGO) is prepared from graphene oxide (GO) [14,15].…”

Section: Introductionmentioning

confidence: 99%

The effect of the temperature of graphene oxide reduction on low-temperature sorption of 4He

Долбин

Khlistyuck

Esel'son

et al. 2016

Low Temperature Physics

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The sorption of 4 He by graphene oxide powders thermally reduced at T = 200, 300, 500, 700, 900 ºC has been investigated in the interval 1.5-290 K. The measured dependence of the quantity of sorbed helium upon the reduction temperature shows up as a nonmonotonic curve. The highest quantities of helium were sorbed by the samples reduced at T = 300 and 900 ºC. It is assumed that the thermal reduction of graphite oxide by heating it to 300 ºC causes evaporation of the water intercalated in the spacings of the carbon layers, this results in exfoliation of the graphene planes, which enhances the sorptive capacity. Heating the samples to 900 ºC generates numerous defects in the carbon planes, as a result, the interlayer spacings become accessible for sorption, which enhances the sorptive capacity.PACS: 65.80.+n Thermal properties of small particles, nanocrystals, and nanotubes.

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“…For ED-MIL-101, peaks at 1581 and 1051 cm −1 can be assigned to the N−H plane stretching and C−N bond stretching, respectively. 35,36 Moreover, the peak at 882 cm −1 can correspond to the −NH 2 stretching frequency. 37 In addition, the broad band from 3434 cm −1 to 3231 cm −1 is located at −NH stretching.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Pb(II) Ions from Aqueous Samples with Amino-Functionalization of Metal–Organic Frameworks MIL-101(Cr)

2015

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Metal organic frameworks (MOFs) have been regarded as robust adsorbents for the adsorptive removal of organic pollutants because of their unique characteristics. However, the application of MOFs in the removal of metals from water is still rare. In this paper, amino-functionalization of Cr-based MOFs MIL-101 are modified through coordination bonding of unsaturated Cr metal centers with the −NH 2 group in ethylenediamine (ED), and we demonstrate their excellent performance for the removal of Pb(II) ions from water. The Fourier transform infrared verifies that the ethylenediamine was grafted successfully on MIL-101. Furthermore, the results of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy show that the structure of ED-MIL-101 with an appropriate amount of ED almost does not collapse and retains the original performance of MIL-101. The adsorption capacity of ED-MIL-101, which is more than five times that of MIL-101, is 81.09 mg·g −1 for Pb(II) ions from aqueous samples. The selectivity coefficients of ED-MIL-101 for Pb(II)/Cu(II), Pb(II)/ Zn(II), Pb(II)/Co(II), and Pb(II)/Ni(II) are 6.92, 24.02, 15.69, and 14.53, respectively. The adsorption kinetics of Pb(II) ions shows that the process fits well with a pseudo-second-order model, and the adsorption equilibrium time is only about 30 min. Moreover, the practical application of ED-MIL-101 achieves almost 97.22% removal efficiency for Pb(II) ions. These results indicate that ED-MIL-101 has great potential in selectively removing Pb(II) ions from water environment.

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Novel electrochemical sensor based on functionalized graphene for simultaneous determination of adenine and guanine in DNA

Cited by 238 publications

References 32 publications

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

The effect of the temperature of graphene oxide reduction on low-temperature sorption of 4He

Adsorptive Removal of Pb(II) Ions from Aqueous Samples with Amino-Functionalization of Metal–Organic Frameworks MIL-101(Cr)

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