Graphene nanowalls for high-performance chemotherapeutic drug sensing and anti-fouling properties

Tzouvadaki, Ioulia; Aliakbarinodehi, Nima; Pineda, Diana Dávila; Micheli, Giovanni De; Carrara, Sandro

doi:10.1016/j.snb.2018.02.036

Cited by 25 publications

(6 citation statements)

References 31 publications

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“…In planar graphene, these bands (D and D+D′) are absent. The presence of high-intensity D and D+D′ peaks signify a larger number of sharp edges in our VG samples …”

Section: Resultsmentioning

confidence: 90%

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Ultrathin Lubricant-Infused Vertical Graphene Nanoscaffolds for High-Performance Dropwise Condensation

et al. 2021

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Lubricant-infused surfaces (LIS) are highly efficient in repelling water and constitute a very promising family of materials for condensation processes occurring in a broad range of energy applications. However, the performance of LIS in such processes is limited by the inherent thermal resistance imposed by the thickness of the lubricant and supporting surface structure, as well as by the gradual depletion of the lubricant over time. Here, we present an ultrathin (∼70 nm) and conductive LIS architecture, obtained by infusing lubricant into a vertically grown graphene nanoscaffold on copper. The ultrathin nature of the scaffold, combined with the high in-plane thermal conductivity of graphene, drastically minimize earlier limitations, effectively doubling the heat transfer performance compared to a state-of-the-art CuO LIS surface. We show that the effect of the thermal resistance to the heat transfer performance of a LIS surface, although often overlooked, can be so detrimental that a simple nanostructured CuO surface can outperform a CuO LIS surface, despite filmwise condensation on the former. The present vertical graphene LIS is also found to be resistant to lubricant depletion, maintaining stable dropwise condensation for at least 24 h with no significant change of advancing contact angle and contact angle hysteresis. The lubricant consumed by the vertical graphene LIS is 52.6% less than that of the existing state-of-the-art CuO LIS, also making the fabrication process more economical.

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“…In planar graphene, these bands (D and D+D′) are absent. The presence of high-intensity D and D+D′ peaks signify a larger number of sharp edges in our VG samples …”

Section: Resultsmentioning

confidence: 90%

“…The presence of high-intensity D and D+D′ peaks signify a larger number of sharp edges in our VG samples. 60 The surface wetting property of VG was determined before and after the impregnation of lubricant. Using the sessile drop method, the contact angle measurement was performed with deionized water droplets.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin Lubricant-Infused Vertical Graphene Nanoscaffolds for High-Performance Dropwise Condensation

et al. 2021

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“…Electrochemical electrodes made by VG are a further upgraded version because of the larger surface area and even more rich active sites compared to planar graphene and CNTs. VG electrochemical electrodes have been used to detect/sense multiple molecules. , …”

Section: Other Physical/chemical Effects and Novel Applicationsmentioning

confidence: 99%

“…VG electrochemical electrodes have been used to detect/sense multiple molecules. 119,120 The sensing system is based on cyclic-voltammetry technology, composed of working, reference, and counter electrodes. A time-dependent potential is applied between the working electrode and the reference electrode, and the resulting current is measured as a function of this potential.…”

Section: Energy Storage and Conversion Devicesmentioning

confidence: 99%

Review of Vertical Graphene and its Applications

Zheng

Zhao

2021

ACS Appl. Mater. Interfaces

108

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Vertical graphene (VG) is a thin-film complex material featuring hierarchical microstructures: graphene-containing carbon nanosheets growing vertically on its deposition substrate, few-layer graphene basal layers, and chemically active atomistic defect sites and edges. Thanks to the fundamental characteristics of graphene materials, e.g. excellent electrical conductivity, thermal conductivity, chemical stability, and large specific surface area, VG materials have been successfully implemented into various niche applications which are strongly associated with their unique morphology. The microstructure of VG materials can be tuned by modifying growth methods and the parameters of growth processes. Multiple growth processes have been developed to address faster, safer, and mass production methods of VG materials, as well as accommodating various applications. VG's successful applications include field emission, supercapacitors, fuel cells, batteries, gas sensors, biochemical sensors, electrochemical analysis, strain sensors, wearable electronics, photo trapping, terahertz emission, etc. Research topics on VG have been more diversified in recent years, indicating extensive attention from the research community and great commercial value. In this review article, VG's morphology is briefly reviewed, and then various growth processes are discussed from the perspective of plasma science. After that, the most recent progress in its applications and related sciences and technologies are discussed.

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“…Because the mechanism through which these three drugs affect the DNA of targeted cells is not fully understood, electrochemical sensors based on graphene nanowalls, graphene quantum dots and carbon quantum dots have been developed to monitor and to better understand the pharmacodynamics properties of these drugs. [16][17][18][19][20] However, further studies are required to help scientists design new anti-tumour drugs. By including 3D carbonic nanomaterials like vertical graphene into the design of the electrodes, their sensing capabilities could be improved.…”

Section: Introductionmentioning

confidence: 99%

Vertical Graphene-Based Electrochemical Biosensor for Detection of Specific Chemotherapeutic Agents

Avram,

Marculescu,

Preda

et al. 2024

Preprint

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This study is part of an extended investigation into the quantitative detection of therapeutic molecules with antineoplastic properties, specifically focusing on bleomycin. The objective is to minimize adverse effects while maximizing therapeutic effectiveness. We are presenting the results for bleomycin detection, in terms of cyclic voltammetry and electrochemical impedance spectroscopy. We are continuing an approach we have recently started, of an electrochemical biosensor based on graphene, which is evidenced to be a revolutionary nanomaterial. The vertical graphene biosensor exhibited improved sensitivity, faster response, faster occurrence of the chemical reactions, and higher electrode surface conductivity, than the classical gold IDE sensor. The construction of the electrochemical sensor involved growing vertically aligned graphene nanosheets on the conductive surface of interdigitated electrodes. The results for bleomycin detection emphasized that a simpler surface modification method proved to be more efficient.

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Graphene nanowalls for high-performance chemotherapeutic drug sensing and anti-fouling properties

Cited by 25 publications

References 31 publications

Ultrathin Lubricant-Infused Vertical Graphene Nanoscaffolds for High-Performance Dropwise Condensation

Ultrathin Lubricant-Infused Vertical Graphene Nanoscaffolds for High-Performance Dropwise Condensation

Review of Vertical Graphene and its Applications

Vertical Graphene-Based Electrochemical Biosensor for Detection of Specific Chemotherapeutic Agents

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