scholarly journals Controlled Functionalization of Graphene Layers

10.5772/67630 ◽  
2017 ◽  
Author(s):  
Maurizio Galimberti ◽  
Vincenzina Barbera ◽  
Annalisa Sironi
Keyword(s):  
Graphene Layers

Magnetooptics of graphene layers

2012 ◽  
Vol 182 (11) ◽  
pp. 1223-1228 ◽  
Author(s):  
L.A. Falkovsky
Keyword(s):  
Graphene Layers

scholarly journals Manipulating the surface-enhanced Raman spectroscopy (SERS) activity and plasmon-driven catalytic efficiency by the control of Ag NP/graphene layers under optical excitation

Nanophotonics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1529-1540
Author(s):  
Xianwu Xiu ◽  
Liping Hou ◽  
Jing Yu ◽  
Shouzhen Jiang ◽  
Chonghui Li ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Hot Spot ◽  
Catalytic Efficiency ◽  
Surface Enhanced Raman Spectroscopy ◽  
In Situ Monitoring ◽  
Excitation Beam ◽  
Graphene Layers ◽  
Cu Film ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Abstract Highly efficient plasmon-driven catalysis and excellent surface-enhanced Raman spectroscopy (SERS) performance are proportional to the square of the local electromagnetic field (hot spot). However, a proven way to realize the enhancement in intensity and density of “hot spot” still needs to be investigated. Here, we report on multilayered Ag nanoparticle (Ag NP)/graphene coupled to an underlying Cu film system (MAgNP-CuF) which can be used as an effective SERS substrates realizing ultra-sensitive detection for toxic molecules and in situ monitoring the plasmon-driven reaction for p-nitrothiophenol (PNTP) to p,p′-dimercaptobenzene (DMAB) conversion. The mechanism of ultra-sensitive SERS response and catalytic reaction is investigated via Ag NP/graphene layer-dependent experiments combined with theoretical simulations. The research found that the intensity and density of “hot spot” can be effectively manipulated by the number of plasmonic layers, and the bottom Cu film could also reflect the scattered and excitation beam and would further enhance the Raman signals. Moreover, the MAgNP-CuF exhibits outstanding performance in stability and reproducibility. We believe that this concept of multilayered plasmonic structures would be widely used not only in the field of SERS but also in the wider research in photocatalysis.

Abnormal Dielectric Constant of Nanoconfined Water between Graphene Layers in the Presence of Salt

2021 ◽  
Vol 125 (6) ◽  
pp. 1604-1610
Author(s):  
Hossein Jalali ◽  
Erfan Lotfi ◽  
Radha Boya ◽  
Mehdi Neek-Amal
Keyword(s):  
Dielectric Constant ◽  
Graphene Layers ◽  
Nanoconfined Water

scholarly journals A rapid nanobiosensing platform based on herceptin-conjugated graphene for ultrasensitive detection of circulating tumor cells in early breast cancer

2021 ◽  
Vol 10 (1) ◽  
pp. 744-753
Author(s):  
Zahra Rahimzadeh ◽  
Seyed Morteza Naghib ◽  
Esfandyar Askari ◽  
Fatemeh Molaabasi ◽  
Ali Sadr ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Cancer Detection ◽  
Breast Cancer Cells ◽  
Graphene Nanosheets ◽  
Her2 Positive ◽  
Promising Candidate ◽  
Graphene Layers ◽  
The Stability ◽  
Positive Breast Cancer

Abstract In this paper, we use a simple and cheap approach for the synthesis of herceptin-conjugated graphene biosensor to detect the HER2-positive breast cancer cells. The bifunctional graphene-herceptin nanosheets are prepared from graphite by a simple ultrasonic-mediated technique. The prepared protein-mediated graphene is fully characterized. The results show the exfoliation of graphene layers in herceptin solution. Moreover, herceptin is effectively conjugated into the surface of graphene nanosheets. The synthesized herceptin-conjugated graphene is applied for breast cancer detection. The linear range of this biosensor is 1–80 cells, which is significant. The biosensor shows an excellent selectivity performance for detection of HER2-positive cancer cells. Likewise, the stability and functionality of the biosensor is about 40 days. Based on the results, this device is a promising candidate for rapid and selective detection of cancer cells.

scholarly journals Hydrothermal synthesis of nanocrystalline hydroxyapatite–graphene nanosheet on Ti-6Al-7Nb: mechanical and in vitro corrosion performance

2021 ◽  
Vol 32 (4) ◽  
Author(s):  
Oktay Yigit ◽  
Burak Dikici ◽  
Niyazi Ozdemir
Keyword(s):  
Hydrothermal Reaction ◽  
Hybrid Coatings ◽  
Stoichiometric Ratio ◽  
Corrosion Performance ◽  
Graphene Nanosheet ◽  
Graphene Layers ◽  
Nanocrystalline Hydroxyapatite ◽  
One Step ◽  
Nano Size

AbstractThe hybrid coatings containing the graphene nano-sheet (GNS) and nano-hydroxyapatite (nHA) phases have been successfully synthesized on Ti6Al7Nb alloys by a one-step hydrothermal method. The hydrothermal reaction was carried out for 24 h at 200 °C. The GNS ratio has been altered as 1, 3, 5 and 7 wt.% in the coatings and, the results have compared with non- GNS containing coatings. The effect of the GNS ratio on the microstructure, hardness, and in vitro corrosion responses has been investigated in detail. The characterizations of the coatings were carried out by SEM, EDS, AFM, XRD and, FTIR. The corrosion behavior of the hybrid coatings was compared in Kokubo’s solution at 37 °C by using potentiodynamic polarization tests. The results showed that the hydroxyapatite phases were deposed on the graphene layers with nano-size nucleation with its Ca/P stoichiometric ratio. The best hydrophilicity (~52°) property has been obtained in nHA/3GNS coatings. In addition, the corrosion rates of coatings increased in the following order: nHA/3GNS < nHA/1GNS < nHA/7GNS < nHA/5GNS < only nHA.

Constructing MoS2/CoMo2S4/Co3S4 nanostructures supported by graphene layers as the anode for lithium-ion batteries

2020 ◽  
Vol 49 (4) ◽  
pp. 1167-1172 ◽  
Author(s):  
Pengcheng Wang ◽  
Peng Zhang ◽  
Xiaohang Zheng ◽  
Jian Cao ◽  
Yang Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Energy Demand ◽  
Anode Materials ◽  
Lithium Ion ◽  
Graphene Layers

With the increasing energy demand, it is very urgent to develop new anode materials for lithium ion batteries (LIBs).

Imaging and nanoprobing of graphene layers for interconnects by conductive atomic force microscopy

2015 ◽  
Vol 54 (5S) ◽  
pp. 05EB02 ◽  
Author(s):  
Li Zhang ◽  
Masayuki Katagiri ◽  
Taishi Ishikura ◽  
Makoto Wada ◽  
Hisao Miyazaki ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Conductive Atomic Force Microscopy ◽  
Graphene Layers ◽  
Force Microscopy ◽  
Atomic Force

Tuning the electrical properties of exfoliated graphene layers using deep ultraviolet irradiation

2014 ◽  
Vol 2 (27) ◽  
pp. 5404-5410 ◽  
Author(s):  
M. Z. Iqbal ◽  
M. F. Khan ◽  
M. W. Iqbal ◽  
Jonghwa Eom
Keyword(s):  
Electrical Properties ◽  
Ultraviolet Irradiation ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Graphene Bilayer ◽  
Graphene Layers ◽  
Exfoliated Graphene ◽  
Deep Ultraviolet ◽  
Trilayer Graphene ◽  
Unique Band

Deep ultraviolet irradiation tunes the electronic properties of mechanically exfoliated single-layer graphene, bilayer graphene, and trilayer graphene while maintaining their unique band structure and electrical properties.

Spatial variation of the number of graphene layers formed on the scratched 6H–SiC(0001) surface

2012 ◽  
Vol 258 (10) ◽  
pp. 4672-4677 ◽  
Author(s):  
J. Osaklung ◽  
C. Euaruksakul ◽  
W. Meevasana ◽  
P. Songsiriritthigul
Keyword(s):  
Spatial Variation ◽  
Graphene Layers
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