Influence of gold nanoholes and nanoslits arrays on Raman spectra and optical reflectance of graphene oxide

Quispe, Luis T.; Menezes, J. W.; Chong, Wu; Zegarra, Lizandro B. R.; Armas, Luis Enrique Gomez

doi:10.1364/oe.26.031253

Cited by 4 publications

(3 citation statements)

References 51 publications

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“…Simultaneously, the Raman spectra were instrumental in determining graphene's disorder degree by analyzing the I D /I G peak intensity ratio [58]. The I D /I G ratio increased with low defect density and decreased with high defect density [59]. Moreover, the I 2D /I G ratio, representing the peak intensities between the 2D and G peaks, was closely associated with the graphene layers' quantity [60,61].…”

Section: Crystal Phase Structurementioning

confidence: 99%

Microstructure and Biocompatibility of Graphene Oxide/BCZT Composite Ceramics via Fast Hot-Pressed Sintering

Zhao,

Liu,

Tang

et al. 2024

Coatings

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Improving fracture toughness, electrical conductivity, and biocompatibility has consistently presented challenges in the development of artificial bone replacement materials. This paper presents a new strategy for creating high-performance, multifunctional composite ceramic materials by doping graphene oxide (GO), which is known to induce osteoblast differentiation and enhance cell adhesion and proliferation into barium calcium zirconate titanate (BCZT) ceramics that already exhibit good mechanical properties, piezoelectric effects, and low cytotoxicity. Using fast hot-pressed sintering under vacuum conditions, (1 − x)(Ba0.85Ca0.15Zr0.1Ti0.9)O3−xGO (0.2 mol% ≤ x ≤ 0.5 mol%) composite piezoelectric ceramics were successfully synthesized. Experimental results revealed that these composite ceramics exhibited high piezoelectric properties (d33 = 18 pC/N, kp = 62%) and microhardness (173.76 HV0.5), meeting the standards for artificial bone substitutes. Furthermore, the incorporation of graphene oxide significantly reduced the water contact angle and enhanced their wettability. Cell viability tests using Cell Counting Kit-8, alkaline phosphatase staining, and DAPI staining demonstrated that the GO/BCZT composite ceramics were non-cytotoxic and effectively promoted cell proliferation and growth, indicating excellent biocompatibility. Consequently, with their superior mechanical properties, piezoelectric performance, and biocompatibility, GO/BCZT composite ceramics show extensive potential for application in bone defect repair.

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Section: Crystal Phase Structurementioning

confidence: 99%

Microstructure and Biocompatibility of Graphene Oxide/BCZT Composite Ceramics via Fast Hot-Pressed Sintering

Zhao,

Liu,

Tang

et al. 2024

Coatings

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“…[131,133,325] Additionally, although often left open to the environment, nanoslits can be capped to achieve coupling between the surface and the capped materials, as described in Figure 9C. [134,326] Because repeated arrays of nanoslits are organized, periodic structures (considered to be a type of nanoarray or nanolattice), they even exploit many of the same optical properties as nanohole arrays, such as LSPR and FRET, along with enhanced Fano Resonance and the Purcell effect; [326,327] however, the unique nanoslit structure can also yield certain distinct optical properties compared to nanoholes. [327] Mousavi et al detected a miRNA biomarker of kidney damage in the urine of patients that suffered acute kidney injury by utilizing SPR properties of a capped Au nanoslit surface.…”

Section: Nanoslitsmentioning

confidence: 99%

“…[134,326] Because repeated arrays of nanoslits are organized, periodic structures (considered to be a type of nanoarray or nanolattice), they even exploit many of the same optical properties as nanohole arrays, such as LSPR and FRET, along with enhanced Fano Resonance and the Purcell effect; [326,327] however, the unique nanoslit structure can also yield certain distinct optical properties compared to nanoholes. [327] Mousavi et al detected a miRNA biomarker of kidney damage in the urine of patients that suffered acute kidney injury by utilizing SPR properties of a capped Au nanoslit surface. They used a double hydridization approach in which the target miRNA was first captured using oligonucleotide probe functionalized magnetic NPs, followed by a second hybridization step using the probe functionalized nanoslit array.…”

Section: Nanoslitsmentioning

confidence: 99%

Advances in Biosensors and Diagnostic Technologies Using Nanostructures and Nanomaterials

Welch

Powell

Clevinger

et al. 2021

Adv Funct Materials

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Nanoscale materials have unique properties that make them especially useful for biomedical diagnostic applications. Recent developments in nanoengineering have resulted in increasing use of nanostructures in biosensors. Various types of 0D, 1D, 2D, and 3D nanostructures have been used to improve biosensor sensitivity, selectivity, limit of detection, and time to result, among other metrics. These nanostructures have been integrated into electrochemical, optical, and other biosensors for this purpose. Here, the most recent advances in the use of nanostructured materials in biosensors are described. This includes a discussion of nanoparticles, nanorods, nanofibers, nanopillars, nanowires, nanosheets, indented nanopatterns (nanoholes and nanoslits), nanogaps, nanochannels, nanopores, nanofunctionalized surfaces, and complex hierarchical structures and their unique advantages and applications in biosensors. Clinical applications of these nanobiosensors are also highlighted along with a discussion of the future directions for these materials in diagnostics.

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Characterization of the picosecond laser-ablated HOPG using Raman spectroscopy and SEM microscopy

Ronoh

Sobola

Mrňa

et al. 2023

Materials Today Communications

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Influence of gold nanoholes and nanoslits arrays on Raman spectra and optical reflectance of graphene oxide

Cited by 4 publications

References 51 publications

Microstructure and Biocompatibility of Graphene Oxide/BCZT Composite Ceramics via Fast Hot-Pressed Sintering

Microstructure and Biocompatibility of Graphene Oxide/BCZT Composite Ceramics via Fast Hot-Pressed Sintering

Advances in Biosensors and Diagnostic Technologies Using Nanostructures and Nanomaterials

Characterization of the picosecond laser-ablated HOPG using Raman spectroscopy and SEM microscopy

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