Copper graphene heterostructure for back end of line
The graphene capped Cu interconnects showed lower resistivity higher breakdown current density and improved reliability compared with those of pure Cu
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Layer controlled single crystalline graphene film with
The C solubility in Cu can be modulated by depositing Ni or Co to form a Cu–Ni or Cu–Co alloy and the number of graphene layers can be controlled by tuning the alloy composition 21 22 23 24
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Copper/graphene composites a review
between Cu and graphene which just leaves weak mechanical adhesion and van der Waals interactions 12 Thus the often wrinkled structure of graphene could play an important role in enhancing the mechanical interlocking between the graphene and Cu which in turn leads to a better load transfer 13 A final challenge is that graphene can
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Effects of Cu/graphene interface on the mechanical
The Cu/graphene systems including various zigzag and armchair graphene layers are denoted as CuZigX and CuArmX respectively where the X represents the number of graphene layers In this work 1 2 3 and 4 graphene layers are included
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Monolayer Graphene on CuGraphenea
Substrate Cu Foil Thickness 18 μm Roughness around 80 nm Pretreated for easier bottom layer removal Monolayer graphene on the back side of Copper is partially removed but not completely so an additional treatment like RIE is needed before transfer to eliminate the bottom layer totally
Get PriceOrigin of the mosaicity in graphene grown on Cu 111
We use low energy electron microscopy to investigate how graphene grows on Cu 111 Graphene islands first nucleate at substrate defects such as step bunches and impurities A considerable fraction of these islands can be rotationally misaligned with the substrate generating grain boundaries upon interisland impingement New rotational boundaries are also generated as graphene grows
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Electrical Modeling of On Chip Cu Graphene Heterogeneous
In this letter novel Cu graphene heterogeneous interconnects are studied by virtue of the equivalent circuit model The effective resistances of such interconnects are extracted numerically with the Cu/graphene and graphene graphene interface resistances treated appropriately It is shown that such interconnects can provide superior performance and reliability over Cu wires for an on chip
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Copper graphene heterostructure for back end of line
Taking the 500 nm width test Cu interconnects with 7 nm thick graphene capping layer as an example where ρ Cu = 9 58 μΩ cm ρ Cu/Graphene = 9 29 μΩ cm and ρ Cu/N graphene = 9 25
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Graphene Induced Surface Reconstruction of Cu
Cu and graphene grains can be clearly observed see also Figure S1b showing the STM image of a typical unannealed sample A significant source of the observed roughness on graphene is attributed to the steps on the underlying Cu substrate 18 giving Figure 1 STM images of graphene grains on Cu foil a An STM topographic image of a graphene
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Copper/graphene composites a review SpringerLink
Cu/graphene composites have been prepared by electroless plating of graphene with Ni particles and it is found that at a content of 0 13 wt the electrical
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High performance Cu nanoparticles/three dimensional
The graphene film with wrinkles and Cu NPs are observed from TEM images figures S5 a and b EDX spectra of Cu NPs/G shows there are two elements C and Cu figure S5 e Those results demonstrate the good combination of graphene and Cu NPs Cu NPs are still well distributed on graphene film even after removing nickel foam substrate
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Cu 2 O Au GrapheneAu layered structures as
NIR SERS substrate with Cu 2 OAu core shell particles distributed over the Au substrate with graphene spacer layer with optimized aspect ratio Cu 2 O 50 nm Au 22 nm is found to show
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A review of chemical vapour deposition of graphene on
substrates such Ni 16 Pd 17 Ru 18 Ir19 or Cu 20 In particular recent developments on uniform single layer deposition of graphene on copper foils over large areas have allowed access to high quality material 20 21 Although CVD of graphene on copper is relatively new several groups around the world have already reported
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One step synthesis of sandwich type Cu/graphene/Cu
The process includes 1 A loose graphene oxide GO membrane was prepared by electrophoresis deposition EPD that allows Cu ions passing through 2 According to the difference of Cu deposition potential on different substrates a potential step was designed for electrodepositing Cu successively on both sides of the GO membrane i e the bottom Cu layer forms under low over potential while the top Cu
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Large Area Synthesis of High Quality and Uniform Graphene
The growth of graphene on Cu foils of varying thickness 12 5 25 and 50 μm also yielded similar graphene structure with regions of double and triple flakes but neither discontinuous monolayer graphene for thinner Cu foils nor continuous multilayer graphene for thicker Cu foils as we would have expected based on the precipitation mechanism
Get PriceCatalysis performance comparison for electrochemical
A Pd–Cu/graphene catalyst for the electrochemical reduction of CO2 was prepared by means of sodium borohydride reduction in a graphite oxide suspension with metal precursor salts and characterized by X ray diffraction XRD scanning electron microscopy SEM transmission electron microscopy TEM X ray photoele
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Dislocation graphene interactions in Cu/graphene
In compression of Cu/graphene nanopillars the strengthening effect of free graphene was found to be less obvious than that of the periodic case which could be attributed to free graphene edges acting as dislocation sources after the compressed Cu overflowed the graphene sheet from all directions
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Effects of Polycrystalline Cu Substrate on Graphene
Cu 100 surface causes slow multilayer graphene growth High index Cu facets cause compact graphene island formation but their growth rates are still faster than those on Cu 100 In contrast the Cu 111 surface promotes fast monolayer graphene growth with few
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Argon assisted growth of epitaxial graphene on Cu 111
Abstract The growth of graphene by catalytic decomposition of ethylene on Cu 111 in an ultrahigh vacuum system was investigated with low energy electron diffraction low energy electron microscopy and atomic force microscopy Attempts to form a graphene overlayer using ethylene at pressures as high as 10 mTorr and substrate temperatures as
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An efficient Cu/functionalized graphene oxide catalyst for
The copper nanoparticles Cu NPs and amide functionalized graphene oxide Cu Amd RGO catalyst were prepared This prepared catalyst Cu Amd RGO used for the synthesis of tetrazole derivatives The catalyst Cu Amd RGO was characterized by field emission scanning electron microscopy FE SEM transmission electron microscopy TEM Fourier transform infrared
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Preparation and Characterization of Electroplated Cu
Abstract Cu and unoxidized graphene composite films were prepared by electroplating under room temperature Graphene was added to the electrolyte of Cu to form composite materials to improve the performance of Cu for interconnection Composite electrolyte containing high concentration of graphene up to 0 5 g/L was prepared by adding CTAB as surfactant
Get PriceMechanically strengthened graphene Cu composite with
If the densities of Cu and graphene are assumed to be 8 9 g/cm 3 and 2 3 g/cm 3 23 respectively the corresponding volume fraction of the graphene in the G Cu
Get PriceMo2C/graphene heterostructures low temperature chemical
When graphene lies over Cu the 2D peak appears shifted at 2716 cm −1 This is evidence of the interaction between graphene and Mo 2 C as the red shift of the 2D peak reveals the presence of tensile strain in the graphene film Tensile strain takes a value of 0 13 for graphene placed on the heterostructure and a value of 0 18 for graphene
Get PriceCopper/graphene composites a review
relatively short number of studies on Cu/graphene composites show by using graphene as the filler one can improve the mechanical properties of Cu while maintaining good thermal and electrical properties 12 19–74 thereby obtaining CMCs with good structural–functional integration Speciality Cu alloys that could benefit from graphene
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Simultaneously enhanced electrical conductivity and
Because of the extremely low fraction of graphene ppm level in the Gr/Cu micro layered bulk composites the increment is dominated by texture transforming in the Cu matrix while the increment in the Cu/Gr/Cu nanofilm is almost attributed to the contribution of graphene since no difference between the Cu layers was detected between the Cu/Gr/Cu and Cu/Cu nanofilm as
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Novel Cu Nanowires/Graphene as the Back Contact for CdTe
Cu nanowire doped graphene Cu NWs/graphene is successfully incorporated as the back contact in thin film CdTe solar cells 1D single crystal Cu nanowires NWs are prepared by a hydrothermal method at 160 °C and 3D highly crystalline graphene is obtained by ambient pressure CVD at
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Growth of Single Layer and Multilayer Graphene on Cu/Ni
The use of these single crystal foils especially the Cu/Ni alloy foils as growth substrates has enabled the fast growth of single crystal single layer graphene films By increase of the Ni content single crystal bilayer trilayer and even multilayer graphene films have been synthesized In addition we also discuss the wafer scale growth of
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Frontiers A Redox Cu II Graphene Oxide Modified Screen
A novel copper II ions Cu II graphene oxide GO nanocomplex modified screen printed carbon electrode SPCE is successfully developed as a versatile electrochemical platform for construction of sensors without an additionally external redox probe A simple strategy to prepare the redox GO modified SPCE is described Such redox GO based on adsorbed Cu II is prepared by
Get PriceControlled Growth of Single‐Crystal Graphene FilmsZhang
Over the past ten years numerous efforts have been devoted to growing monolayer graphene samples with larger domain sizes and reduced GGBs Following the first synthesis of centimeter sized graphene single crystal by Ruoff s group in 2013 26 meter sized 27 and wafer sized 28 single crystal graphene samples have been successfully synthesized on Cu foil and Cu film substrates in 2017
Get PriceHigh loaded single Cu atoms decorated on N doped graphene
Here single atom Cu dispersed on N doped graphene Cu SA/NGO with relatively high Cu loading of 5 8 wt was prepared for boosting the degradation of contaminants This is the highest value yet reported for dispersion of single metal atoms on graphene
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Unravelling the growth mechanism of 3 1 graphene
The growth of graphene nanoribbons has been widely investigated on metal surfaces in an ultrahigh vacuum Here we re investigate the growth of graphene nanoribbons obtained by thermal annealing of 9 9′ bianthryl derivatives on a Cu 111 surface by using
Get PriceGraphene Induced Surface Reconstruction of Cu
performed on large single crystalline graphene grains synthesized on Cu foil by a chemical vapor deposition CVD method After thermal annealing we observe the presence of periodic surface depressions stripe patterns that exhibit long range order formed in the area of Cu covered by graphene We suggest that the observed stripe pattern is a Cu
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High loaded single Cu atoms decorated on N doped graphene
Here single atom Cu dispersed on N doped graphene Cu SA/NGO with relatively high Cu loading of 5 8 wt was prepared for boosting the degradation of contaminants This is the highest value yet reported for dispersion of single metal atoms on graphene Atomically dispersed CuN4
Get PriceDirect Conversion of CO2 to Multi‐Layer Graphene using Cu
Results and Discussion Cu and Pd metals were chosen to fabricate a series of metallic substrates owing to their advantageous properties in the activation of CO 2 13 or graphene growth 14 The main goal was to find the right metal or combination of metals that can act as a catalytic agent and substrate in the direct capture and conversion of CO 2 into graphene
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Unravelling the growth mechanism of 3 1 graphene
The growth of graphene nanoribbons has been widely investigated on metal surfaces in an ultrahigh vacuum Here we re investigate the growth of graphene nanoribbons obtained by thermal annealing of 9 9′ bianthryl derivatives on a Cu 111 surface by using
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