Pdf highly conducting graphene sheets and langmuirblodgett. We study the effect of oxidative impurities on the properties of graphene oxide and on the graphene oxide langmuir blodgett films lb. Graphene oxide go is a promising precursor for preparing graphene based composites and electronics applications. Constructing graphene oxide gobased 2d nanomaterials via facile and appropriate methods have aroused much attention due to their potential applications in many. However, using the langmuir blodgett technique to immobilize flat graphene oxide sheets on a pet substrate to detect its antibacterial activity showed that contact with the edges is not a vital. Langmuirblodgett assembly of visible light responsive tio2. Transparent conductive films are produced using the ultralarge graphene oxide ulgo sheets that are deposited layerbylayer on a substrate using the langmuir blodgett lb assembly technique. The technique allows the continuous variation of material density, packing, and arrangement by compressing or expanding the film by using barriers. Mar 01, 2019 graphene or reduced graphene oxide films rgofs can be prepared by a number of methods including chemical vapor deposition cvd, filtration, and spi. Langmuirblodgett assembly of visible light responsive. The glucose biosensor can be made of poly3hexyl thiopene as langmuir blodgett film, which entraps glucose oxide and transfers it to a coated indiumtin oxide glass plate.
In addition to forming directly a layer of graphene, another approach that has been widely studied is forming a graphene oxide layer which can then be reduced further into graphene. Langmuirblodgett assembly of graphite oxide single layers. Such interactions were studied at the airwater interface by langmuir blodgett assembly. Pdf effect of subphase ph on langmuirblodgett deposition. The starting material was grupo antolin nanofibers ganf and the oxidation process was a modified hummers method to obtain highly oxidized graphene oxide. Plasma technique involving a variation of plasma power, i. In conventional langmuir blodgett deposition of graphene oxide, alcohol typically methanol. Study of simultaneous reduction and nitrogen doping of. Pdf on the antibacterial mechanism of graphene oxide go. Optimized deposition of graphene oxide langmuirblodgett. Langmuir blodgett deposition of graphene oxide identifying marangoni flow as a process that fundamentally limits deposition control. Selfassembled sno2reduced graphene oxide nanocomposites via langmuir blodgett technique as anode materials for liion batteries published on may 1, 2018 in materials letters 3. Jan 15, 2017 the hybrid nanocomposites of titanium dioxide tio 2 with graphene oxide go have recently garnered much attention as electronic devices, energy conversion devices, photocatalysts and other applications.
A general and facile method for preparation of largescale. Blodgett lb deposition technique has proven to be one. Structure control of ultralarge graphene oxide sheets by the. Different approaches are reported to obtain a single layer go film, e. In applications where the thickness and packing density of graphene layer needs to carefully controlled, the langmuir blodgett method has been used. Large amounts of graphene sheets in organic solvents are made into large transparent conducting films by langmuir blodgett assembly in a layerbylayer manner. Graphene oxide langmuirblodgett films for capacitive energy. Unfortunately, film morphologies vary from sample to sample, often with undesirable characteristics such as folded sheets and patchwise depositions. The hybrid nanocomposites of titanium dioxide tio 2 with graphene oxide go have recently garnered much attention as electronic devices, energy conversion devices, photocatalysts and other applications. Nonlinear optical response of graphene oxide langmuir blodgett film as saturable absorbers jiang wang 1, yonggang wang 1, taijin wang 1, guangying li 2, rui lou 2, guanghua cheng 3 and jing bai 4 1 school of physics and information technology, shaanxi normal university, xian 710119, china. Selfassembled sno2reduced graphene oxide nanocomposites.
Home about us subjects contacts advanced search help. Large area thin films of fewlayered unfunctionalized graphene platelets are developed with fine control over the thickness. Advinculaa the langmuir blodgett lb technique was used to immobilize flat graphene oxide go sheets on a pet substrate to ascertain as to. Uv resists can be made of polynalkylmethacrylamides langmuir blodgett film. Transparent conductive films were produced using the ulgo sheets that were deposited layerbylayer on a substrate by the langmuir blodgett lb assembly technique.
Monolayer ultralarge graphene oxide ulgo sheets with diameter up to about 100. Transparent conductive films were produced using the ulgo sheets that were deposited layerbylayer on a substrate by the langmuir blodgett. Formation of graphene oxidegraphene membrane on solidstate. Related content study of simultaneous reduction and nitrogen doping of graphene oxide langmuir blodgett. Highly conducting graphene sheets and langmuirblodgett. The surface optimization and structural characteristics of langmuir blodgett lb reduced graphene oxide thin rgo film treated by argon plasma treatment were studied.
On the antibacterial mechanism of graphene oxide go. Langmuirblodgett deposition of graphene oxideidentifying. The langmuir blodgett lb method was applied to transfer go from suspension to substrate. It can also be used to deposit single or multiple monolayers on a solid substrate. Monolayer graphene oxide go sheets with sizes ranging from a few to.
In this study, langmuir blodgett lb assembly method was firstly reported to prepare a tio 2 nanotube arrays tnago heterostructure. Optimized deposition of graphene oxide langmuirblodgett thin. N2 singlelayer graphite oxide can be viewed as an unconventional type of soft material and has recently been recognized as a promising material for composite and electronics applications. Like graphene, go is essentially oneatom thick but can be as wide as tens of micrometers, resulting in a unique type of material building block, characterized by two very different length scales. Highly conducting graphene sheets and langmuirblodgett films. Pdf single sheet graphene sg is an innovative transparent material with high electrical and thermal conduction the use of which in. Home about us subject areas contacts advanced search help help. The go sheets were deposited on a quartz plate using the lb method. The thin films are obtained by a langmuir blodgett assembly at the interface of graphene solution in nmethyl2pyrrolidone nmp and water, and their optoelectronic properties and con. However, the existing methods of preparing sas were insufficient. Graphene oxide polymer composite langmuir films constructed by interfacial thiolene photopolymerization xiaona luo1,2, kai ma2, tifeng jiao1,2,3, ruirui xing2,3, lexin zhang2, jingxin zhou2 and bingbing li4 abstract the effective synthesis and selfassembly of graphene oxide go nanocomposites are of key importance for a. We herein report a convenient protocol for forming a highquality graphene graphene oxide go thin membrane on solidstate substrate via the langmuir blodgett selfassembly technique. A modified langmuir blodgett technique for transfer of. Here, we fabricated graphene oxide go sas by langmuir blodgett lb methods for passively qswitched nd.
Langmuirblodgett assembly of ultralarge graphene oxide films for. The preparation of langmuir blodgett lb films based on graphene oxide and the study of their structure and optical properties are presented. The supramolecular organization of the a 3 btype phthalocyanine holmium complex a 3 bho was investigated in floating layers at the airwater interface and in langmuir schaefer thin films at the airsolid interface. Langmuirblodgett assembly of ultralarge graphene oxide.
Preparation of a threedimensional reduced graphene oxide film by using the langmuir blodgett method article pdf available in langmuir 38 september 2015 with 252 reads how we measure. Deposition and characterisation of singlesheet graphene and. Apr 23, 2020 from graphene oxide towards aminated graphene. Graphene oxidepolymer composite langmuir films constructed. The incident angle of the pmirras beam was 80 which means. As commented previously, due to its unique properties graphene has been suggested to be used in a great number of technological applications. Due to the rigid structure of the device as well as its micrometric dimensions, chip. Express 3 035002 view the article online for updates and enhancements. Langmuir blodgett trough to measure a floating graphene oxide layer prepared on a pure water subphase before and after ls deposition to a goldcoated glass slide graph 1 and 2.
Graphene oxide langmuir blodgett films for capacitive energy storage. In conventional langmuirblodgett deposition of graphene oxide, alcohol. A modified langmuir blodgett technique for transfer of graphene oxide monolayer sheets on solid substrates to cite this article. Thus, graphene synthesized by chemical vapor deposition cvd or. Transparent conductive films consisting of ultralarge. The role of oxidative debris on graphene oxide films lopez. A modified langmuirblodgett technique for transfer of. Scanning electron microscopy and atomic force microscopy studies show that plasma treatment at a relatively low power.
T1 langmuirblodgett assembly of graphite oxide single layers. The role of oxidative debris on graphene oxide films. Recently, the chemical reduction of graphite oxide was used to produce covalently functionalized singlelayer graphene oxide. Optoelectronic properties of graphene thin films deposited. Graphene has gained prominence in electrode of electrical doublelayer capacitor due to its high electrical conductivity and high specific surface area. Herein, by langmuir blodgett lb technique, we have successfully fabricated gobased. As a unique type of soft building block, graphene oxide go dispersions are easy to process to produce electronic devices. Among these, the most suitable technique is langmuir blodgett assembly, where the graphene oxide paper formed is usually highly uniform. The langmuir blodgett lb technique was used to immobilize flat graphene oxide go sheets on a pet substrate to ascertain as to whether the edges of go play an integral part in its antimicrobial mechanism. On the antibacterial mechanism of graphene oxide go langmuir blodgett films j. Dec 21, 2017 the surface optimization and structural characteristics of langmuir blodgett lb reduced graphene oxide thin rgo film treated by argon plasma treatment were studied. Langmuir blodgett lb transfer and direct sequential physisorption of silver nanocubes agncs. Plasmatreated langmuirblodgett reduced graphene oxide. Formation of graphene oxidegraphene membrane on solid.
In this work, six times deposition of rgo was deposited on a clean glass substrate using the lb method. Deposition and characterisation of singlesheet graphene. The asprepared tnago sample was characterized by x. Graphene, an important twodimensional nanomaterial, is drawing unprecedented, worldwide attention, especially in electronics, energy storage, environmental science and biological engineering. The chemically derived, highquality graphene sheets could lead to future scalable graphene devices. Nonlinear optical response of graphene oxide langmuir. Preparation and aggregate state regulation of coassembly. Free standing polymer graphene oxide and polymer graphene paper materials show remarkable mechanical stiffness and excellent flexibility combined with outstanding electrical conductivity.
Graphene oxide langmuirblodgett films for capacitive. Langmuir blodgett assembly of graphene oxide sheets laura cote, franklin kim, jiaxing huang northwestern university, department of materials science and engineering, 2220 campus dr. A modified langmuir blodgett mlb technique has been developed as a simple, low cost, energy efficient and scalable alternative to conventional langmuir blodgett lb technique for the transfer of graphene oxide go monolayer sheets from airwater interface on to solid substrates. The sample of graphene oxide go was prepared by the method of cote et al. A langmuir blodgett trough lb trough is a laboratory apparatus that is used to compress monolayers of molecules on the surface of a given subphase usually water and measures surface phenomena due to this compression. Several methods have been explored to date to obtain graphene in solution phase by means of chemical routes. Nevertheless, each application requires a different set of properties.
Controlled graphene oxide assembly on silver nanocube. Optoelectronic properties of graphene thin films deposited by. The effective synthesis and selfassembly of graphene oxide go nanocomposites are of key importance for a broad range of nanomaterial applications. Structure control of ultralarge graphene oxide sheets by. Developing methods to produce large sized go with controllable structure is the key for these applications.
Young investigator perspective tao li et alstudy of gocu 2 o and rgocu. Stable monolayers of graphite oxide single layers were obtained without the need for any surfactant or stabilizing agent, due to the strong electrostatic repulsion between the 2d confined layers. The observed antibacterial activity suggests that contact with. Langmuir blodgett deposition is a popular route to produce thin films of graphene oxide for applications such as transparent conductors and biosensors.
This application note illustrates how a ksv nima langmuirblodgett deposition. Growth of cds nanocrystallites on graphene oxide langmuir blodgett monolayers. Hybrid graphene oxide silver nanocubes goagncs arrays for surfaceenhanced raman spectroscopy sers applications were prepared by means of two procedures differing for the method used in the assembly of the silver nanocubes onto the surface. Blodgett lb methodology is based on the transfer process of a monolayer adsorbed at the water interface, langmuir film, from the air. The graphene sheets exhibit high electrical conductance at room and cryogenic temperatures. Uv light and conductivity of a langmuir blodgett film. Plasmatreated langmuirblodgett reduced graphene oxide thin. The floating layers formed under different experimental conditions on the water subphase using the langmuir technique. Preparation of a threedimensional reduced graphene oxide. In this work, a onestep chemical strategy is presented to synthesize stable gopolymer langmuir composite films by interfacial thiolene photopolymerization at room temperature, without use of any crosslinking agents and stabilizing. Functionalization of partially reduced graphene oxide is the stateoftheart method in synthesis of graphene system which is used in electrode of electrical doublelayer capacitors edlcs. Two different lbgo sas grown under the surface pressure of 22 and 38 mnm were obtained.
Study of graphene oxide solid films prepared by langmuir. Pdf highly conducting graphene sheets and langmuir. Pdf growth of cds nanocrystallites on graphene oxide. Large amounts of graphene sheets in organic solvents are made into large transparent conducting films by langmuir blodgett lb assembly in a layerbylayer manner. Formation of graphene oxide graphene membrane on solidstate substrates via langmuir blodgett selfassembly abstract. Pdf optimized deposition of graphene oxide langmuirblodgett. Langmuirblodgett assembly of transparent graphene oxidesilver. The langmuirblodgett lb technique was used to transfer graphene oxide go and the functionalized agmws fagmws onto a quartz substrate to obtain.
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