Surface Enhanced Raman Scattering Effect in Diamond Like Carbon Films Containing Ag Nanoparticles

Meškinis, Šarūnas; Tamulevičius, Tomas; Niaura, Gediminas; Šlapikas, K.; Vasiliauskas, Andrius; Ulčinas, Orestas; Tamulevičius, Sigitas

doi:10.1166/jnn.2016.12848

Cited by 13 publications

(15 citation statements)

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“…Ar gas flux was 80 sccm and C 2 H 2 gas flux was 7.8 sccm. As reported by our previous study [ 28 ], DLC:Ag films deposited using these conditions revealed the highest SERS signal intensity between all DLC films containing Ag investigated. Thus, strong plasmonic field can be supposed.…”

Section: Methodssupporting

confidence: 83%

Photovoltaic Properties and Ultrafast Plasmon Relaxation Dynamics of Diamond-Like Carbon Nanocomposite Films with Embedded Ag Nanoparticles

et al. 2017

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Ultrafast relaxation dynamics of diamond-like carbon (DLC) films with embedded Ag nanoparticles (DLC:Ag) and photovoltaic properties of heterojunctions consisting of DLC:Ag and crystalline silicon (DLC:Ag/Si) were investigated by means of transient absorption (TAS) spectroscopy and photovoltaic measurements. The heterojunctions using both p type and n type silicon were studied. It was found that TAS spectra of DLC:Ag films were dependent on the used excitation wavelength. At wavelengths where Ag nanoparticles absorbed light most intensively, only DLC signal was registered. This result is in good accordance with an increase of the DLC:Ag/Si heterojunction short circuit current and open circuit voltage with the excitation wavelength in the photovoltaic measurements. The dependence of the TAS spectra of DLC:Ag films and photovoltaic properties of DLC:Ag/Si heterostructures on the excitation wavelength was explained as a result of trapping of the photoexcited hot charge carriers in DLC matrix. The negative photovoltaic effect was observed for DLC:Ag/p-Si heterostructures and positive (“conventional”) for DLC:Ag/n-Si ones. It was explained by the excitation of hot plasmonic holes in the Ag nanoparticles embedded into DLC matrix. Some decrease of DLC:Ag/Si heterostructures photovoltage as well as photocurrent with DLC:Ag film thickness was observed, indicating role of the interface in the charge transfer process of photocarriers excited in Ag nanoparticles.

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Section: Methodssupporting

confidence: 83%

Photovoltaic Properties and Ultrafast Plasmon Relaxation Dynamics of Diamond-Like Carbon Nanocomposite Films with Embedded Ag Nanoparticles

et al. 2017

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“…The increase in D peak intensity and the appearance of additional Raman scattering peaks upon the introduction of silver nanoparticles in the a‐C:H matrix could be associated with the SERS effect. Meškinis et al reported a clearly pronounced SERS effect for nanocomposite DLC:Ag thin films containing 11.3 at% silver, which is consistent with our findings. The Raman peaks and the absorption spectra of sample DLC‐0 are typical for a‐C:H films synthesized from C 2 H 2 precursor .…”

Section: Resultssupporting

confidence: 93%

“…The specific deposition parameters for different samples are shown in Table . Two different DLC:Ag deposition conditions were chosen similar to those reported by Meškinis et al, where it was addressed that quite different nanoparticle size distributions can be obtained depending on the silver content. In addition, silver thin films with 60 nm thickness on silicon and quartz substrates (sample Ag‐100) were deposited using e‐beam evaporation.…”

Section: Methodsmentioning

confidence: 99%

“…The Raman scattering spectrum ( Figure 1b) of the DLC-0 sample is consistent with similar spectra reported in other studies describing amorphous hydrogenated DLC films (a-C:H). [18,19,33,34] The peak at 1535 cm À1 in the DLC-0 Raman scattering spectrum and the shoulder at around 1400 cm À1 are commonly attributed to G peak (bond stretching vibration of all pairs of sp 2 carbon atoms) and D peak (shoulder at lower wavenumbers related to the breathing vibration modes of sp 2 bonded rings). Usually, ratio of these two peaks is used to characterize the ratio of sp 3 to sp 2 bonds in DLC.…”

Section: Analysis Of the Pristine Thin Filmsmentioning

confidence: 99%

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Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

et al. 2019

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Patterning of nanocomposites by conventional lithography processes is problematic due to the different physical properties of matrix and filler. Direct laser interference patterning (DLIP) promises rapid micromachining of virtually any material with subwavelength resolution. A control of intense laser light modifies the filler particle size distribution in nanocomposite films. Herein, DLIP of periodic patterns with half‐pitch <1 μm in reactive magnetron‐sputtered hydrogenated amorphous diamond‐like carbon nanocomposite thin films with embedded silver nanoparticles (DLC:Ag) is demonstrated. Periodic patterns of regularly repeating areas with modified size distributions of silver nanoparticles are obtained by a variation of fluences and number of pulses of 515 nm wavelength femtosecond laser. Depending on the silver content in nanocomposite films, nanoparticle size distributions are either bimodal (for 14.1 at% Ag containing films) or unimodal (7.9 at%) with effective average diameters shifting from 13 to 69 nm, depending on the laser processing parameters. The importance of localized surface plasmon absorption and localized field enhancement at the DLC–Ag interface for lowering the ablation threshold of DLC:Ag nanocomposites below 6 mJ cm−2 at 1000 pulses is demonstrated. This is at least four times lower than the threshold for pure DLC obtained using the same DLIP setup.

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“…Бактерицидные свойства серебра позволяют использовать углеродсеребряные пленки в качестве антибактериальных покрытий [3,4,6], а также покрытий для пищевой промышленности [2]. В свою очередь, сочетание плазмонных свойств серебряных наночастиц и химической инертности углеродной матрицы позволяют изготавливать на основе углерод-серебряных пленок высокостабильные серебряные подложки для реализации эффекта поверхностно-усиленного комбинационного рассеяния света (SERS-подложки, где SERS -surfaceenhanced Raman spectroscopy, поверхностно-усиленная спектроскопия комбинационного рассеяния) [7]. Стоит отметить, что для данных приложений роль углеродной матрицы сводится не только к формированию прочной оболочки для металлических частиц: ее структура может оказывать влияние на оптические свойства покрытий [8], а также регулировать выход металла [9], что может сказываться на долговечности и эффективности антибактериальных свойств материала, а также его плазмонных свойствах.…”

Section: Introductionunclassified

Унимодальное и бимодальное распределение серебряных наночастиц в a-C : Ag-структурах с различным соотношением sp-=SUP=-2-=/SUP=-/sp-=SUP=-3-=/SUP=--углерода, изготовленных методом низкоэнергетического ионно-ассистированного импульсно-плазменного осаждения

Завидовский¹,

Хайдаров²,

Стрелецкий³

2022

Физика Твердого Тела

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Представлены результаты исследования аморфных углеродных покрытий с инкапсулированными серебряными наночастицами (a-C : Ag). Методом просвечивающей электронной микроскопии показано, что введение низкоэнергетического (100-300 eV) ионного ассистирования в процесс импульсно-плазменного осаждения может в различных случаях привести как к унимодальному, так и к бимодальному распределению серебряных включений по размерам. Установлено, что характер распределения определяется мощностью импульсно-плазменного источника. Рассмотрено влияние вариации потока осаждающихся частиц на процесс ионно-индуцированной поверхностной диффузии на поверхности покрытий. Показано, что данный процесс в совокупности с ионно-индуцированным формированием центров зародышеобразования оказывает влияние на характер распределения серебряных включений по размерам. С помощью спектроскопии характеристических потерь энергии электронов установлено, что изменение поверхностной концентрации серебряных наночастиц коррелирует с соотношением sp2- и sp3-гибридизованных атомов углерода. Ключевые слова:импульсно-плазменное напыление; ионная стимуляция; углерод-серебряный композит; бимодальное распределение частиц; соотношение sp2- и sp3-гибридизованного углерода.

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Surface Enhanced Raman Scattering Effect in Diamond Like Carbon Films Containing Ag Nanoparticles

Cited by 13 publications

References 0 publications

Photovoltaic Properties and Ultrafast Plasmon Relaxation Dynamics of Diamond-Like Carbon Nanocomposite Films with Embedded Ag Nanoparticles

Photovoltaic Properties and Ultrafast Plasmon Relaxation Dynamics of Diamond-Like Carbon Nanocomposite Films with Embedded Ag Nanoparticles

Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

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