Supramolecular Chemistry on Graphene Field‐Effect Transistors

Zhang, Xiaoyan; Huisman, E. H.; Gurram, Mallikarjuna; Browne, Wesley R.; Wees, B. J. van; Feringa, Ben L.

doi:10.1002/smll.201303098

Cited by 20 publications

(28 citation statements)

References 29 publications

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“…[152] A combined STM study of the self-assembly of molecular lamellas formed on graphene surface and its effect on the electrical properties of graphene showed that commercially available CVD graphene can be used as a substrate for the self-assembly of BUT 3 molecules into ordered architectures. Changes in charge carrier mobility and in doping levels were observed in G-FET after BUT 3 functionalization.…”

Section: Non-covalent Functionalization Of Graphene: Modulating the Pmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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Graphene, a one-atom thick two-dimensional (2D) material, is at the core of an ever-growing research effort due to its combination of unique mechanical, thermal, optical and electrical properties. Two strategies are being pursued for the graphene production: the bottom-up and the top-down. The former relies on the use of covalent chemistry approaches on properly designed molecular building blocks undergoing chemical reaction to form 2D covalent networks. The latter occurs via exfoliation of bulk graphite into individual graphene sheets. Amongst the various types of exfoliations exploited so far, ultrasound-induced liquid-phase exfoliation (UILPE) is an attractive strategy, being extremely versatile, up-scalable and applicable to a variety of environments. In this review, we highlight the recent developments that have led to successful non-covalent functionalization of graphene and how the latter can be exploited to promote the process of molecule-assisted UILPE of graphite. The functionalization of graphene with non-covalently interacting molecules, both in dispersions as well as in dry films, represents a promising and modular approach to tune various physical and chemical properties of graphene, eventually conferring to such a 2D system a multifunctional nature.

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Section: Non-covalent Functionalization Of Graphene: Modulating the Pmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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“…Graphene can be produced by various top-down and bottom-up methods, including mechanical exfoliation, chemicalv apor deposition (CVD), liquid-phase exfoliation, and reduction of graphene oxide (GO). [10,26] The properties of graphene can be engineered through chemicalf unctionalization, [27] which can offer major improvementsa nd tuning of fundamental interfacial characteristics, such as dispersibility,w ettability,a nd processability of graphene.A tt he same time, it can also impart new optical, electronic, magnetic, catalytic, or electrochemical properties to the materialt hrough the introduction of additional functional units. As ar esult, strong pp interactions between individual sheets renders processing of the materialc umbersome, [25] yieldingw orse performances in practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, much efforth as been invested to the development of facile, reliable, and low-cost synthetic routest owardst he preparation of highly dispersible and processable graphene derivatives. [27,31] On the other hand, covalent functionalization of graphene yields more stable and robust systems. [28,29] Graphenec an be functionalized at the covalento r noncovalent level.…”

Section: Introductionmentioning

confidence: 99%

Modular Preparation of Graphene‐Based Functional Architectures through Two‐Step Organic Reactions: Towards High‐Performance Energy Storage

Zhang

Hou

Richard

et al. 2018

Chemistry A European J

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Graphene-based materials have recently attracted much attention due to their extraordinary physical and chemical properties, which make them attractive candidates for many technological applications in sensing, optoelectronics, catalysis, and energy storage. Their chemical functionalization is key to tuning their properties. Herein, a novel two-step synthetic approach, which enables a high degree of covalent functionalization of graphene oxide (GO) is devised, thereby making the facile attachment of various robust functional molecules possible. Such a process relies initially on the grafting of an ethylenediamine linker followed by a second step consisting of the condensation reaction between aldehyde and amine groups to form imine bonds. As test beds, two kinds of graphene-based functional systems, namely, porphyrin-modified GO and ferrocene-modified GO, are prepared. Such hybrid systems are characterized by various spectroscopic and microscopic techniques. The degree of functionalization is quantified as the attachment of one porphyrin or ferrocene unit to every 34 or 77 carbon atoms of the GO scaffold, respectively, which is much higher than that of values obtained upon using various established chemical approaches to functionalize GO, such as condensation, cycloaddition, or coupling reactions. For the first time, the reduced form of ferrocene-modified GO was employed as an electrode material in supercapacitors, showing a specific capacitance of 127 F g at a current density of 1 A g , with capacitance retention of about 93 % after 5000 cycles at the same current density; this demonstrates great potential for application in high-performance energy-storage devices.

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“…Given the immense opportunities offered by hybrid organic–inorganic vdW heterostructures in modifying the fundamental electronic properties of the pristine materials, the field is still widely unexplored3. There are only a few reports connecting doping effects with the specific position of functional groups2636373839, and combining molecules and 2D materials for the technological need of forming p–n junctions4041.…”

mentioning

confidence: 99%

Periodic potentials in hybrid van der Waals heterostructures formed by supramolecular lattices on graphene

et al. 2017

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The rise of 2D materials made it possible to form heterostructures held together by weak interplanar van der Waals interactions. Within such van der Waals heterostructures, the occurrence of 2D periodic potentials significantly modifies the electronic structure of single sheets within the stack, therefore modulating the material properties. However, these periodic potentials are determined by the mechanical alignment of adjacent 2D materials, which is cumbersome and time-consuming. Here we show that programmable 1D periodic potentials extending over areas exceeding 104 nm2 and stable at ambient conditions arise when graphene is covered by a self-assembled supramolecular lattice. The amplitude and sign of the potential can be modified without altering its periodicity by employing photoreactive molecules or their reaction products. In this regard, the supramolecular lattice/graphene bilayer represents the hybrid analogue of fully inorganic van der Waals heterostructures, highlighting the rich prospects that molecular design offers to create ad hoc materials.

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Supramolecular Chemistry on Graphene Field‐Effect Transistors

Cited by 20 publications

References 29 publications

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Modular Preparation of Graphene‐Based Functional Architectures through Two‐Step Organic Reactions: Towards High‐Performance Energy Storage

Periodic potentials in hybrid van der Waals heterostructures formed by supramolecular lattices on graphene

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