Interaction of Single-Stranded DNA with Curved Carbon Nanotube Is Much Stronger Than with Flat Graphite

Iliafar, Sara; Mittal, Jeetain; Vezenov, Dmitri V.; Jagota, Anand

doi:10.1021/ja5055498

Cited by 57 publications

(77 citation statements)

References 65 publications

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“…The results are shown in Table 2. 23 Va nd E 1/2 2 = À0.52 V), and 5 (E 1/2 = À1.86 V), and two oxidation waves for 4 (E 1/2 1 = 0.37 V and E 1/2 2 = 0.62 V) with respect to Ag/AgCl. 23 Va nd E 1/2 2 = À0.52 V), and 5 (E 1/2 = À1.86 V), and two oxidation waves for 4 (E 1/2 1 = 0.37 V and E 1/2 2 = 0.62 V) with respect to Ag/AgCl.…”

Section: Experimental Association Constantsmentioning

confidence: 94%

“…[23] On the other hand,ak inetic modelf or the quantification of chirality-specific interactions of SWNTs with hydrogels has also been report-ed, [24] providing the foundation for both the mechanistic understanding of gel-based SWNT separation as well as the potential industrial-scale realization of single-chirality production of carbon nanotubes. For instance, single-molecule force spectroscopy has been used to measure the force required to remove singlestranded DNA homopolymers from SWNTs.…”

Section: Introductionmentioning

confidence: 99%

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Understanding Noncovalent Interactions of Small Molecules with Carbon Nanotubes

Calbo

López‐Moreno

Juan

et al. 2017

Chemistry A European J

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We combine experimental methods, density functional theory (DFT) calculations, and molecular dynamics (MD) simulations in the quantitative analysis of noncovalent interactions between (6,5)-enriched single-walled carbon nanotubes (SWNTs), as hosts, and a set of pyrene derivatives with different electronic properties and surface areas, as guests. The experiments and calculations were carried out in two solvents with markedly different polarities, namely 1,1',2,2'-tetrachloroethane (TCE) and N,N-dimethylformamide (DMF). Our results show that dispersion forces govern the supramolecular association of small molecules with (6,5)-SWNTs, with negligible contributions from ground-state charge-transfer effects. In the nonpolar solvent (TCE), the binding constants are highly correlated with the contact area between the SWNT and the guests. In the polar solvent (DMF), the binding constants show a complex dependence on the chemical nature of the pyrene substituents, as demonstrated by MD simulations with the explicit inclusion of solvent molecules. The solvation of the small molecules is shown to play a leading role in the binding process. Remarkably, the binding constants obtained from the MD simulations for the five guest molecules correlate with those derived from experiment. Furthermore, the MD simulations also reveal the structure of the adsorbed guest from low to high SWNT surface coverage.

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Section: Experimental Association Constantsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Understanding Noncovalent Interactions of Small Molecules with Carbon Nanotubes

Calbo

López‐Moreno

Juan

et al. 2017

Chemistry A European J

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show abstract

“…35 More recently, Vezenov, Jagota and co-workers have obtained experimental data quantifying the strength of the interaction between the different nucleobases and SWNTs, using single strand DNA (ss-DNA) and AFM techniques (Fig. 36 Their results show that adenine interaction is slightly stronger (ca. 36 Their results show that adenine interaction is slightly stronger (ca.…”

Section: View Article Onlinementioning

confidence: 99%

π–π interactions in carbon nanostructures

2015

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π-π Interactions are the dominating supramolecular forces in systems like carbon nanostructures, which are inherently constituted by large conjugated π-systems. Their skilful use has allowed the construction of fascinating supramolecular ensembles, thus opening a new avenue in carbon chemistry. In this tutorial review, we provide a short introduction to carbon nanostructures, and show the basic concepts of π-π interactions involving fullerenes, carbon nanotubes, and graphene.

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“…21 Fundamental studies on the interaction between DNA and GO were also carried out. 11,[22][23][24][25][26][27][28][29][30][31][32] GO is a loosely defined material, and the oxygen content can vary quite a lot depending on the preparation condition. The adsorption affinity of DNA is likely to depend on the oxygen content.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Graphene Oxide and Reduced Graphene Oxide for DNA Adsorption and Sensing

et al. 2016

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Fluorescently labeled DNA adsorbed on graphene oxide (GO) is a well-established sensing platform for detecting a diverse range of analytes. GO is a loosely defined material and its oxygen content may vary depending on the condition of preparation. Sometimes, a further reduction step is intentionally performed to decrease the oxygen content and the resulting material is called reduced GO (rGO). In this work, DNA adsorption and desorption from GO and rGO is systematically compared. Under the same salt concentration, DNA adsorbs slightly faster with a 2.6-fold higher capacity on rGO. At the same time, adsorbed DNA on rGO is more resistant to desorption induced by temperature, pH, urea, and organic solvents. Various lengths and sequences of DNA probes have been tested. When its complementary DNA (cDNA) is added as a model target analyte, the rGO sample has a higher signal-to-background and signalto-noise ratio, while the GO sample has a slightly higher absolute signal increase and faster signaling kinetics. Adsorbed DNAs on GO or rGO are still susceptible to non-specific displacement by other DNA and proteins. Overall, while rGO adsorb DNA more tightly, it allows efficient DNA sensing with an extremely low background signal.

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Interaction of Single-Stranded DNA with Curved Carbon Nanotube Is Much Stronger Than with Flat Graphite

Cited by 57 publications

References 65 publications

Understanding Noncovalent Interactions of Small Molecules with Carbon Nanotubes

Understanding Noncovalent Interactions of Small Molecules with Carbon Nanotubes

π–π interactions in carbon nanostructures

Comparison of Graphene Oxide and Reduced Graphene Oxide for DNA Adsorption and Sensing

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