Using a photochemical method and chitosan to prepare surface-enhanced Raman scattering–active silver nanoparticles

Yang, Kuang-Hsuan; Chang, Chia‐Ming

doi:10.1016/j.aca.2012.03.059

Cited by 5 publications

(9 citation statements)

References 39 publications

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“…2 shows representative normalized Raman spectra of the various lms tested. Consistently with previous studies, [28][29][30] the main bands displayed by pure chitosan and PEO are located in the 800-1400 rel cm À1 interval. Among these, the N-H wagging (u N-H ) as well as the amide I, II and III bands uniquely belong to Peak deconvolution and tting allowed us to precisely compare the normalized bands intensity and monitor their variations as a function of the composition.…”

Section: Resultssupporting

confidence: 92%

“…C-H deformation, s C-H /u C-H , in the 1342-1371 rel cm À1 region) as internal standard and tted by Guassian functions. [28][29][30] The assignment of the peaks was performed according to previous literature. [28][29][30][31][32][33][34][35][36] The same soware was also used to carry out oneway ANOVA test.…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…[28][29][30] The assignment of the peaks was performed according to previous literature. [28][29][30][31][32][33][34][35][36] The same soware was also used to carry out oneway ANOVA test. A p value <0.05 was used to identify statistically signicant differences.…”

Section: Raman Spectroscopymentioning

confidence: 99%

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Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends

et al. 2015

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Cathodic electrodeposition is a bottom up process that is emerging as a simple yet efficient strategy to engineer thin polymeric films with well-defined physicochemical properties. In particular, this technique offers the distinctive advantage of an easy control over composition, thickness, and morphology of the films by simply adjusting treatment parameters. In this work, cathodic electrodeposition was exploited to engender blends composed by chitosan (CH) and poly-ethylene-oxide (PEO) with different weight ratios. The physicochemical and nanomechanical properties of the resulting films were successively characterized by integrating Raman and Fourier-transform infrared (FT-IR) spectroscopy with Atomic Force Microscopy (AFM). Our findings demonstrate that electro-deposition is an effective technique for the co-deposition of CH:PEO blends. Moreover, spectroscopic and AFM analyses correlated the physicochemical (i.e. structural organization, bond formation and cross-linking) and nanomechanical properties of the blends to the PEO content, ultimately unveiling the molecular interactions and mechanisms involved in the cathodic deposition of CH:PEO film

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Section: Resultssupporting

confidence: 92%

Section: Raman Spectroscopymentioning

confidence: 99%

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Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends

et al. 2015

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“…Silver nanoparticles (AgNPs) have attracted increasing interest due to their unique physical, chemical and biological properties, including surface-enhanced Raman scattering, catalytic activity, non-linear optical behavior and broad-spectrum bactericidal activity [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Many methods have been reported for the synthesis of AgNPs with chemical, physical, photochemical and biological routes with tunable size and shape [ 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Comparative Biological Properties of Ag-PEG Nanoparticles with Tunable Morphologies from Janus to Multi-Core Shell Structure

Liu

et al. 2018

Materials

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Silver nanoparticles synthesized with polymers as coating agents is an effective method to overcome their poor stability and aggregation in solution. Silver-polyethylene glycol (Ag-PEG) nanoparticles were synthesized with the thiol-functionalized polyethylene glycol (SH-PEA) as the coating, reducing and stabilizing agent. The UV irradiation time, polymer and silver nitrate concentration for the synthesis were investigated. The concentration of silver nitrate had significant effect on the morphology of Ag-PEG nanoparticles. When increasing the concentration of silver nitrate, SEM and TEM images showed that Ag-PEG nanoparticles changed from Janus to multi-core shell structure. Meanwhile, pure silver particles in the two hybrid nanoparticles presented spherical shape and had the similar size of 15 nm. The antibacterial activities and cytotoxicity of the two structural Ag-PEG nanoparticles were investigated to understand colloid morphology effect on the properties of AgNPs. The results of antibacterial activities showed that the two structural Ag-PEG nanoparticles exhibited strong antibacterial activities against Staphylococcus aureus, Escherichia coli and Bacillus subtilis. The Janus nanoparticles had larger minimal inhibitory concentration (MIC) and minimum bacterial concentration (MBC) values than the multi-core shell counterparts. The results of cytotoxicity showed the Janus Ag-PEG nanoparticles had lower toxicity than the multi-core shell nanoparticles.

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“…Since the last decade a large spectrum of research has been focused to control the size and shape, which is crucial in tuning physical, chemical, and optical properties of nanomaterials. A large variety of synthetic approaches have been explored for the preparation of silver nanoparticles with different morphologies, for example, hydrothermal synthesis [10][11][12], microemulsion [13,14], electrochemical deposition [15][16][17], photochemical method [18,19], -ray irradiation, and so forth [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Surface‐Enhanced Raman Scattering Study of Silver Nanoparticles Prepared by Using MC as a Template

Feng

Liu

et al. 2013

Journal of Nanomaterials

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A good Ag-based SERS substrate has been prepared by one-pot reaction using methyl cellulose as a template. Effects of methyl cellulose concentration, silver ammonia chloride solution concentration, reaction duration, and reducing agent on silver nanoparticles were discussed in this paper. The performance of the obtained Ag nanoparticles was characterized by UV-visible spectroscopy, transmission electron microscopy, and surface-enhanced Raman spectroscopy. Results show that the reducing agent plays a crucial role in the performance of silver nanoparticles. Optimum preparation conditions of synthesis of SERS substrates were as follows: 10 mM silver ammonia chloride and 0.2% MC at 75°C, reducing in 0.2% reducing agent at 120 min. TEM studies reveal that particles are mostly spherical and rod in shape with an average size of 80 nm. Silver nanoparticles prepared with MC as a template have been shown to provide strong SERS enhancement signals of R6G, which can be used as a good Ag-based SERS substrate in the analytical environment for routine measurements.

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Using a photochemical method and chitosan to prepare surface-enhanced Raman scattering–active silver nanoparticles

Cited by 5 publications

References 39 publications

Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends

Physicochemical and nanomechanical investigation of electrodeposited chitosan:PEO blends

Synthesis and Comparative Biological Properties of Ag-PEG Nanoparticles with Tunable Morphologies from Janus to Multi-Core Shell Structure

Surface‐Enhanced Raman Scattering Study of Silver Nanoparticles Prepared by Using MC as a Template

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