Water structure and charge transfer phenomena at the liquid–graphene interface

2012 ◽  
Vol 14 (42) ◽  
pp. 14605 ◽  
Author(s):  
Luisa D'Urso ◽  
Cristina Satriano ◽  
Giuseppe Forte ◽  
Giuseppe Compagnini ◽  
Orazio Puglisi
Keyword(s):  
Charge Transfer ◽  
Water Structure ◽  
Graphene Interface

Manipulating the charge transfer at CuPc/graphene interface by O2plasma treatments

Nanoscale ◽  
2014 ◽  
Vol 6 (14) ◽  
pp. 8149-8154 ◽  
Author(s):  
Hongying Mao ◽  
Fang Hu ◽  
Quan-Lin Ye ◽  
Yifeng Xu ◽  
Xuxin Yang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Pristine Graphene ◽  
Graphene Interface

The manipulation of charge transfer at CuPc/graphene interface has been demonstrated by treating pristine graphene with O2plasma.

Observation of Ground- and Excited-State Charge Transfer at the C60/Graphene Interface

ACS Nano ◽  
2015 ◽  
Vol 9 (7) ◽  
pp. 7175-7185 ◽  
Author(s):  
Giriraj Jnawali ◽  
Yi Rao ◽  
Jonathan H. Beck ◽  
Nicholas Petrone ◽  
Ioannis Kymissis ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Graphene Interface ◽  
State Charge

Charge Transfer in Ultrafine LDH Nanosheets/Graphene Interface with Superior Capacitive Energy Storage Performance

2017 ◽  
Vol 9 (43) ◽  
pp. 37645-37654 ◽  
Author(s):  
Yingchang Jiang ◽  
Yun Song ◽  
Yanmei Li ◽  
Wenchao Tian ◽  
Zhichang Pan ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Energy Storage ◽  
Capacitive Energy Storage ◽  
Storage Performance ◽  
Graphene Interface

scholarly journals Assessing the Charge Transfer at the Cytochrome c553/Graphene Interface: A Multiscale Investigation

2018 ◽  
Vol 122 (51) ◽  
pp. 29405-29413 ◽  
Author(s):  
Alicja M. Kowalska ◽  
Bartosz Trzaskowski ◽  
Silvio Osella
Keyword(s):  
Charge Transfer ◽  
Cytochrome C553 ◽  
Graphene Interface

scholarly journals Deciphering asymmetric charge transfer at transition metal dichalcogenide–graphene interface by helicity-resolved ultrafast spectroscopy

2021 ◽  
Vol 7 (34) ◽  
pp. eabg2999
Author(s):  
Hongzhi Zhou ◽  
Yuzhong Chen ◽  
Haiming Zhu
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Ultrafast Spectroscopy ◽  
Spin Dynamics ◽  
Hole Injection ◽  
Transition Metal Dichalcogenide ◽  
Transfer Processes ◽  
Spin Polarized ◽  
Graphene Interface ◽  
Interfacial Charge

Transition metal dichalcogenide (TMD)/graphene (Gr) heterostructures constitute a key component for two-dimensional devices. The operation of TMD/Gr devices relies on interfacial charge/energy transfer processes, which remains unclear and challenging to unravel. Fortunately, the coupled spin and valley index in TMDs adds a new degree of freedom to the charges and, thus, another dimension to spectroscopy. Here, by helicity-resolved ultrafast spectroscopy, we find that photoexcitation in TMDs transfers to graphene by asynchronous charge transfer, with one type of charge transferring in the order of femtoseconds and the other in picoseconds. The rate correlates well with energy offset between TMD and graphene, regardless of compositions and charge species. Spin-polarized hole injection or long-lived polarized hole can be achieved with deliberately designed heterostructures. This study shows helicity-resolved ultrafast spectroscopy as a powerful and facile approach to reveal the fundamental and complex charge/spin dynamics in TMD-based heterostructures, paving the way toward valleytronic and optoelectronic applications.

Study of Charge Transfer at the Quantum Dot–Graphene Interface by Raman Spectroscopy

2019 ◽  
Vol 123 (40) ◽  
pp. 24943-24948
Author(s):  
Butian Zhang ◽  
Kexin Wang ◽  
Ruiheng Chang ◽  
Xin Yi ◽  
Youwei Zhang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Charge Transfer ◽  
Quantum Dot ◽  
Graphene Interface

Disentangling Charge Transfer, Heat Conduction, and Strain Effects at WS2/Graphene Interface

2021 ◽  
Author(s):  
Ruiling Zhang ◽  
Lin Gan ◽  
Danyang Zhang ◽  
Zhen Wang ◽  
Cun-Zheng Ning
Keyword(s):  
Charge Transfer ◽  
Heat Conduction ◽  
Strain Effects ◽  
Graphene Interface

The Hofmeister effect and the behaviour of water at interfaces

1985 ◽  
Vol 18 (4) ◽  
pp. 323-422 ◽  
Author(s):  
Kim D. Collins ◽  
Michael W. Washabaugh
Keyword(s):  
Charge Transfer ◽  
Water Molecule ◽  
Water Structure ◽  
Water Layer ◽  
Bulk Water ◽  
Water Molecules ◽  
Interfacial Water ◽  
Hydrogen Bonding Interactions ◽  
Air Water Interface ◽  
Polar Solutes

SUMMARYStarting from known properties of non-specific salt effects on the surface tension at an air–water interface, we propose the first general, detailed qualitative molecular mechanism for the origins of ion-specific (Hofmeister) effects on the surfacepotential differenceat an air–water interface; this mechanism suggests a simple model for the behaviour of water at all interfaces (including water–solute interfaces), regardless of whether the non-aqueous component is neutral or charged, polar or non-polar. Specifically, water near an isolated interface is conceptually divided into three layers, each layer being 1 water-molecule thick. We propose that the solute determines the behaviour of the adjacent first interfacial water layer (I1); that the bulk solution determines the behaviour of the third interfacial water layer (I3), and that bothI1andI3compete for hydrogen-bonding interactions with the intervening water layer (I2), which can be thought of as a transition layer. The model requires that a polar kosmotrope (polar water-structure maker) interact withI1more strongly than would bulk water in its place; that a chaotrope (water-structure breaker) interact withI1somewhat less strongly than would bulk water in its place; and that a non-polar kosmotrope (non-polar water-structure maker) interact withI1much less strongly than would bulk water in its place.We introduce two simple new postulates to describe the behaviour ofI1water molecules in aqueous solution. The first, the ‘relative competition’ postulate, states that anI1water molecule, in maximizing its free energy (—δG), will favour those of its highly directional polar (hydrogen-bonding) interactions with its immediate neighbours for which the maximum pairwise enthalpy of interaction (—δH) is greatest; that is, it will favour the strongest interactions. We describe such behaviour as ‘compliant’, since anI1water molecule will continually adjust its position to maximize these strong interactions. Its behaviour towards its remaining immediate neighbours, with whom it interacts relatively weakly (but still favourably), we describe as ‘recalcitrant’, since it will be unable to adjust its position to maximize simultaneously these interactions. The second, the ‘charge transfer’ postulate, states that the strong polar kosmotrope–water interaction has at least a small amount of covalent character, resulting in significant transfer of charge from polar kosmotropes to water–especially of negative charge from Lewis bases (both neutral and anionic); and that the water-structuring effect of polar kosmotropes is caused not only by the tight binding (partial immobilization) of the immediately adjacent (I1) water molecules, but also by an attempt to distribute among several water molecules the charge transferred from the solute. When extensive, cumulative charge transfer to solvent occurs, as with macromolecular polyphosphates, the solvation layer (the layer of solvent whose behaviour is determined by the solute) can become up to 5- or 6-water-molecules thick.We then use the ‘relative competition’ postulate, which lends itself to simple diagramming, in conjunction with the ‘charge transfer’ postulate to provide a new, startlingly simple and direct qualitative explanation for the heat of dilution of neutral polar solutes and the temperature dependence of relative viscosity of neutral polar solutes in aqueous solution. This explanation also requires the new and intriguing general conclusion that as the temperature of aqueous solutions is lowered towards o °C, solutes tend to acquire a non-uniform distribution in the solution, becoming increasingly likely to cluster 2 water molecules away from other solutes and surfaces (the driving force for this process being the conversion of transition layer water to bulk water). The implications of these conclusions for understanding the mechanism of action of general (gaseous) anaesthetics and other important interfacial phenomena are then addressed.

scholarly journals Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

2018 ◽  
Vol 6 (18) ◽  
pp. 5046-5054 ◽  
Author(s):  
Silvio Osella ◽  
Małgorzata Kiliszek ◽  
Ersan Harputlu ◽  
Cumhur G. Unlu ◽  
Kasim Ocakoglu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Flow Direction ◽  
Nitrilotriacetic Acid ◽  
Graphene Interface ◽  
Charge Flow ◽  
Nickel Cation ◽  
Transfer Flow

Tuning of the charge flow direction at the SAM–graphene interface by coordination of the SAM with a nickel cation.

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