Midinfrared plasmons in patterned graphene could advance the development of surfaceenhanced infrared absorption spectroscopy seiras. In this investigation nano graphene oxide as synthesized via sulfuric acid dehydration bce of cartonite clay as substrate. It is a highly sensitive method to determine and quantify the amount of defects in graphene. Characterization of a reduced graphene oxide based biosensor via infrared spectroscopy. Graphene as thin film infrared optoelectronic sensor. We developed nanosized, reduced graphene oxide nanorgo sheets with high near infrared nir light absorbance and biocompatibility for potential photothermal therapy. Pdf unusual infraredabsorption mechanism in thermally reduced. The process relied on the electrochemical reduction of go sheets deposited on the surface of cu electrode. Gold nanoparticle mediated graphene plasmon for broadband enhanced infrared spectroscopy lilan peng1,2,7, lei zhang3,4,7, jian yuan2, chen chen2, qiaoliang bao5, chengwei qiu4,6, zeping peng1,8. Construction of alizarin conjugated graphene oxide composites. One of the most structurally important materials, graphene oxide go, is prepared by the. Ftir spectra of graphene oxide, srtio3 particles, and s. The role of oxygen during thermal reduction of graphene.
Nov 11, 2011 we report spectroscopy results from the mid to far infrared on waferscale graphene, grown either epitaxially on silicon carbide or by chemical vapor deposition. In situ surfaceenhanced infrared absorption spectroscopy of. Farinfrared spectroscopy can be used to probe the intraband absorption in largearea graphene grown by chemical vapor deposition cvd. Graphene has the potential to reshape the landscape of photonics and optoelectronics owing to its exceptional optical and electrical properties. However, in order to study graphene based devices, it is important to distinguish the number of graphene layers and quantify the effect of disorder on its properties. Antibacterial activity of graphite, graphite oxide, graphene oxide, and reduced graphene oxide. Polyurethane nanocomposites containing reduced graphene. Characterization of graphene oxide and reduced graphene uvvis spectroscopy as shown in figure s2, the absorption peak at 230 nm redshifted to 270 nm, indicating that the electronic conjugation within the reduced graphene sheets was revived upon reduction of graphene oxide li, d.
Jun 21, 2016 graphene oxide go is extensively proposed as an effective antibacterial agent in commercial product packaging and for various biomedical applications. Toxicity of graphene and graphene oxide nanowalls against bacteria. Introduction graphene oxide and its reduced forms have attracted signi. Tunable optical properties of graphene oxide by tailoring. Their unique properties are not only restricted to graphene but also shared with derivative compounds like graphene oxide, reduced graphene oxide, functionalized graphene, and so forth. Infrared barriering behavior of reduced graphene oxide aerogel antimony tin oxidepolyaniline hybrids author links open overlay panel hongyan li a magdalena sztukowska a b c hongli liu a hongyuan dong a dorota malaszkiewicz c hai zhang b d xiao wang b e. Graphene oxide, with a carbontooxygen atomic ratio co of around 2,1,2 was. Raman spectroscopy is a reliable tool to determine and visualize the heterogeneity of graphene.
Tunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiation r maiti1, a midya2, c narayana3 and s k ray1 1department of physics, indian institute of. Quantitative detection of oxygen in reduced graphene oxide. Transform infrared spectroscopy ftir, xray diffraction xrd and uvvis. However, the generation of graphene layers from graphite is. Efficient control of ultrafast optical nonlinearity of. Combined effects of functional groups, lattice defects. Ultravioletvisible uvvis spectroscopic data show that fewlayer go dispersions can be distinguished from multi and thicklayer dispersions by a more intense peak at 230 nm.
Here, we describe our recent effort toward this direction by studying the goinduced vibrational changes of interfacial water and lipid membrane with surfaceenhanced infrared absorption seira spectroscopy. Midinfrared mir represents a crucial spectral region for applications in spectroscopy, sensing, imaging, security and industry screening, owing to the strong characteristic vibrational transitions of many. Synthesis and characterization of graphene oxide and reduced. In this work, the go nanosheets were prepared by a chemical exfoliation technique. In this study, onestep adsorption strategy was utilized to conjugate alizarin az on graphene oxide go and characterized by ultravioletvisible spectroscopy uvvis, attenuated total reflectance fourier transform infrared.
Graphene oxide 2 mgml, dispersion in h2o sigmaaldrich. The process started with the chemical oxidation of commercial graphite powder into graphite. Fourier transformed infrared spectroscopy analysis. To unravel the complex mechanisms leading to the removal of oxygen in reduced go, we have performed in situ transmission infrared. Overall go sheets obtained after 6 h of oxidation, go 6 h, were found to be. Graphene oxide go is extensively proposed as an effective antibacterial agent in commercial product packaging and for various biomedical applications. In particular, its infrared ir response is characterized by longlived collective electron oscillations plasmons that can be dynamically tuned by electrostatic gating, in contrast to conventional plasmonic materials such as noble metals 4. Graphene has many unique properties that make it an ideal material for fundamental studies as well as for potential applications. Ir spectroscopy is a powerful tool to unravel the composition and. Recently, graphene and other graphene based materials have become an essential part of composite science and technology.
The structural and optical properties of the asprepared go nanosheets were characterized by raman, ftir, uvvis and photoluminescence spectroscopy. Applications of graphene oxide and reduced graphene oxide. In situ surfaceenhanced infrared absorption spectroscopy. Due to its unique properties, graphene oxide has become one of the most studied materials of the last decade and a great variety of applications have been reported in areas such as sensors, catalysis and.
Revealing the nature of interaction between graphene oxide. Characterization of a reduced graphene oxide based biosensor. Ultrasmall reduced graphene oxide with high nearinfrared. Synthesis and characterization of graphene oxide and. Controlled synthesis, characterization and reduction of graphene. Ultravioletvisible spectroscopy of graphene oxides qi lai, shifu zhu, xueping luo, min zou, and shuanghua huang citation. Dispersions of fewlayer layers, multilayer 410 layers and thicklayer 10 layers graphene oxide go were prepared by a modified hummers method with different mass ratios of kmno4 to graphite. Srtio3graphene nanocomposites were prepared via photocatalytic reduction of graphene oxide by uv lightirradiated srtio3 nanoparticles. Synthesis of graphene oxide go by modified hummers. This research studied the synthesis of graphene oxide and graphene via a lowcost manufacturing method. In contrast to such known phenomena, we report here the observation of a giantinfraredabsorption band in reduced graphene oxide, arising from the coupling of electronic states to the. Far infrared spectroscopy can be used to probe the intraband absorption in largearea graphene grown by chemical vapor deposition cvd. Pdf comparison on graphite, graphene oxide and reduced.
This paper proposes a simple, direct, and fast method for the quantitative detection of oxygen in reduced graphene oxide rgo by femtosecond laserinduced breakdown spectroscopy fslibs. For graphene with its massless electrons, the drude weight assumes a completely different form. In this process, the role of trapped water and the evolution of oxygen during annealing are still not wellunderstood. Characterization of reduced graphene oxide rgo by means of raman spectroscopy, xray photoelectron spectroscopy, and uvvisible absorption measurements confirms an efficient reduction with infrared radiation. Tunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiation r maiti1, a midya2, c narayana3 and s k ray1 1department of physics, indian institute of technology kharagpur, kharagpur722, india. Revealing the nature of interaction between graphene oxide go and lipid membrane is a crucial issue but still remains challenging. Having unique properties, graphene layers are a quite interesting nanomaterial for industrial applications. The free carrier absorption drude peak is simultaneously obtained with the universal optical conductivity due to interband transitions and the wavelength at which pauli blocking occurs due to band filling. Midinfrared plasmonic biosensing with graphene daniel rodrigo,1 odeta limaj,1 davide janner,2 dordaneh etezadi,1 f.
The peak at 1,620 cm1 is attributed to the c c skeletal vibration of the graphene sheets. Polyurethane nanocomposites containing reduced graphene oxide. Graphene oxide go was synthesized from graphite and also produced from waste materials, such as coconut shell, rice husk, and bagasse. Ftir spectra were recorded on shimadzu dr8001 spectrometer. Ngocb was characterized by using scaning electron microscope, transmission electron microscope, xray di. In the spectrum of graphene oxide, the absorption peak at 1,726 cm1 is caused by the c o stretching vibration of the cooh group. Sem result showed plateletline surface that appeared on the surface of go 48. Xray photoelectron spectroscopy, and uvvisible absorption. Preparation and characterization of graphene oxide. Construction of alizarin conjugated graphene oxide. Ultravioletvisible spectroscopy of graphene oxides. Synthesis, characterization and study of graphene oxide. Understanding the thermal reduction of graphene oxide go is important for. Graphene oxide powder, 1520 sheets, 410% edgeoxidized.
The role of oxygen during thermal reduction of graphene oxide studied by infrared absorption spectroscopy. The prepared graphene oxide and reduced graphene oxide were characterized by uvvisible spectroscopy, ftir spectroscopy, and xrd. Insight into the local nearinfrared photothermal dynamics. Subsequently reduced graphene oxide rgo having few layer graphene is extracted from go by the thermal reduction of go. Mar 27, 2015 in this paper, an electrochemical approach was described for preparing graphene with different microstructures, starting from aqueous solutions of graphene oxide go, processed under direct voltage. Characterization of a reduced graphene oxide based. Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. In this paper, an electrochemical approach was described for preparing graphene with different microstructures, starting from aqueous solutions of graphene oxide go, processed under. Biofilm inhibition using nanoparticlebased drug carriers has emerged as a noninvasive strategy to eradicate microbial contaminants such as fungus candida albicans.
Raman spectroscopy is a powerful tool for characterizing graphene and its derivatives. Graphene oxide go has been initially prepared by a modified hummersmethod. Jan 31, 2017 36 used reduced graphene oxide films with tcr. Characterization techniques graphene oxide wiley online. Thin films of go and rgo were also deposited on sodalime glass substrate using spray pyrolysis technique spt. Typically, the infraredabsorption lineshapes are modi. Synthesis of graphene oxide go by modified hummers method. Spectroscopy groupand materials group nanomaterials and graphene for photodetection high mobility and fermi velocity potentially allow high operating speeds f t 40 ghz 10 gbits. Over the span of years, improvements over various synthesis methods of graphene are constantly pursued to provide safer and more effective alternatives. Here, we exploit the unique electrooptical properties of graphene to demonstrate. The go obtained from pure graphite was compared with. Spectroscopy and microscopy of graphene oxide and reduced. Figure 2 shows the ftir spectra of graphene oxide, srtio3 particles, and srtio3graphene10% composites. Infrared barriering behavior of reduced graphene oxide.
The role of oxygen during thermal reduction of graphene oxide. Wallace, manish chhowalla, kyeongjae cho, and yves chabal. Quantitative detection of oxygen in reduced graphene oxide by. Understanding the thermal reduction of graphene oxide go is important for graphene exfoliation, and chemical and morphological modifications. Xray photoelectron spectroscopy xps is among the most powerful methods to determine the surface chemical properties of carbon materials. Freestanding graphene oxide midinfrared polarizers. Preparation and characterization of reduced graphene oxide. Infrared spectroscopy of waferscale graphene acs nano. Fourier transform infrared ftir spectroscopy of go was performed.
Their unique properties are not only restricted to graphene but also shared. Ftir spectra of graphene oxide, srtio3 particles, and s openi. Natural flake graphite nfg was procured from loba chemie india having a mean size of 60 mesh and purity of 98%. Graphene oxide go, product numbers 763705 and 777676 is a unique material that can be viewed as a single monomolecular layer of. As a twodimensional carbon sheet of singleatom thickness, graphene has received much attention due to its outstanding mechanical, thermal, chemical and optical properties. Midinfrared plasmonic biosensing with graphene science. Efficient control of ultrafast optical nonlinearity of reduced graphene oxide by infrared reduction journal of applied physics 120, 0101 2016. Combined effects of functional groups, lattice defects, and. Unusual infraredabsorption mechanism in thermally reduced. Ftir graphs in the wavenumber range of 150018500 cm1 pdf. Characterization of graphene oxide and reduced graphene uvvis spectroscopy as shown in figure s2, the absorption peak at 230 nm redshifted to 270 nm, indicating that the electronic conjugation within. In contrast to such known phenomena, we report here the.
First, go was reduced by continuouswave cw laser beams with different powers. We report spectroscopy results from the mid to far infrared on waferscale graphene, grown either epitaxially on silicon carbide or by chemical vapor deposition. Tunable optical properties of graphene oxide by tailoring the. We report spectroscopy results from the mid to farinfrared on waferscale graphene, grown either epitaxially on silicon carbide or by chemical vapor deposition. Recently, graphene and other graphenebased materials have become an essential part of composite science and technology. Farinfrared spectroscopy can be used to probe the intraband absorption in largearea. We show that raman spectroscopy and imaging can be used as a quick and unambiguous method to determine the number of graphene layers. Coatings free fulltext graphene oxide decorated with. Noncolvalent functionalization of graphene with end. Ir study shows that the graphite has been oxidized to graphite oxide with the. Toxicity mechanism of graphene oxide and nitrogendoped. The samples were characterized using fourier transform infrared ftir spectroscopy, scanning. The same electrode is first used as the anode for the electrophoretic deposition of go.
Graphene oxide go, product numbers 763705 and 777676 is a unique material that can be viewed as a single monomolecular layer of graphite with various oxygen containing functionalities such as epoxi. However, limitation in measuring the extinction spectra. The ftir spectrum of rgo shows no sharp peaks confirming the efficient. The go obtained from pure graphite was compared with graphite made from indonesian biomass coconut shell, rice husk, and bagasse that had its silica content removed. Graphene oxide go has recently attracted great attention due to its unique chemical and physical properties. Insight into the local nearinfrared photothermal dynamics of graphene oxide functionalized polymers through optical microfibers yunyun huang, a chaoyan chen, a hongtao li, a aoxiang xiao, a tuan. Graphene oxidetitanium goti composite materials were fabricated using go as a precursor and then anchoring nano titanium nanoti particles on go sheets with the help of a silane coupling agent.
Infrared barriering behavior of reduced graphene oxide aerogel antimony tin oxidepolyaniline hybrids. However, in order to study graphenebased devices, it is important to. Graphene is the basic structural element of carbon allotropes such as fullerenes, nanotubes or graphite. However, infrared light interacts poorly with nanometric size molecules. Transmission infrared absorption spectra of thermally reduced go1l after annealing at 850. Intercalation and stitching of graphite oxide with diaminoalkanes. Study of antibacterial mechanism of graphene oxide using. Request pdf spectroscopy and microscopy of graphene oxide and reduced graphene oxide graphene oxide go is an important material that provides a scalable approach for obtaining chemically. The role of oxygen during thermal reduction of graphene oxide studied by infrared absorption spectroscopy muge acik, geunsik lee, cecilia mattevi, adam pirkle, robert m. Simple synthesis of large graphene oxide sheets via.
Fourier transform infrared spectroscopy ftir was performed on a thermonicolet 6700 ftir spectrometer. Gold nanoparticle mediated graphene plasmon for broadband. Pdf ultravioletvisible spectroscopy of graphene oxides. Infrared spectroscopy can accurately reflect the information of molecular vibration, and it is an important technology to characterize the. Near infrared, lighttriggered, ondemand antiinflammatories and antibiotics release by graphene oxide elecrospun pcl patch for wound healing nicolo mauro 1,2, salvatore emanuele drago 1, gennara cavallaro 1 and gaetano giammona 1 1 laboratory of biocompatible polymers, department of scienze e tecnologie biologiche, chimiche e. Mid infrared mir represents a crucial spectral region for applications in spectroscopy, sensing, imaging, security and industry screening, owing to the strong characteristic vibrational transitions of many important molecules. However, limitation in measuring the extinction spectra with transmission and external reflection configurations greatly restricts the analyses of aqueous samples. Spectroscopy groupand materials group nanomaterials and graphene for photodetection high mobility and fermi velocity potentially allow high operating speeds f t 40 ghz 10 gbits demonstrated absorption of 2. In this process, the role of trapped water and the evolution. Jul 10, 2015 graphene has the potential to reshape the landscape of photonics and optoelectronics owing to its exceptional optical and electrical properties.
1331 1338 815 920 560 99 764 203 436 670 1520 1398 685 947 1318 1142 1242 885 1037 1224 1244 1417 946 78 1346 183 957 1152 1357 189 426 996 1291 422 191 1372 64 913 724 237 1107 1018 1297 1261 791 1347 1428 152 1025 650