Influence of process parameters on surface plasmon resonance characteristics of densely packed gold nanoparticle films grown by pulsed laser deposition

Verma, Shweta; Rao, B. Tirumala; Rai, Sanjay; Ganesan, V.; Kukreja, L. M.

doi:10.1016/j.apsusc.2012.01.111

Cited by 27 publications

(17 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar shape is found for other NPs (Figure 1 at 50 and 100 shots). A Gaussian distribution profile of diameters has been observed for all NPs (an example is reported in Figure 3a for the 10 Pa, 100 shots) in agreement with literature results by Verma et al [32]. Specifically, NPs deposited at 10 Pa, 100 shots have an average diameter equal to 9 nm with a maximum of 16 nm (Figure 3a).…”

Section: Morphology Of As Deposited Au Nps and Filmssupporting

confidence: 90%

“…As a matter of fact, it can be observed that the largest (~16 nm diameter) NPs are obtained at 100 shots, 100 Pa (see also Figure 3 b). NPs have a rounded shape in agreement with most of the literature dealing with PLD deposited NPs [10,27,32,35].…”

Section: Morphology Of As Deposited Au Nps and Filmssupporting

confidence: 88%

“…Specifically, when NPs are formed the optical behavior clearly shows the presence of a SPR peak (the position of the transmittance minimum was determined by Gaussian fitting) and located in the visible range at 562 nm and 606 nm, respectively for 50 and 100 shots. The redshift of the SPR wavelength is related to the increment of NPs size, which changes from 5 nm to 10 nm on average (Figure 3b), in agreement with the literature [30,32]. Furthermore, the reduction of the average transmittance in the visible range upon increasing the number of shots can be related with an increase of the coverage, Figure 3c.…”

Section: A) Effect Of the Number Of Shots At Fixed Pressuresupporting

confidence: 87%

“…The study of the effect of PLD parameters has been carried out by Alonso et al [30] evaluating the plasmonic response as a function of the laser shot number which influences the average size of Ag NPs as well as the formation of percolating structures before 4 the film growth. Verma et al investigated the optical behavior of NPs produced by PLD by varying the substrate heating [31], the target-to-substrate distance [32], the laser fluence [32] as well as changing the composition, i.e. studying Ag-Au NPs [33] and they reported the formation of large NPs (diameter > 50 nm) only if the substrate is heated at T ≥ 150 °C during deposition.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Engineering plasmonic nanostructured surfaces by pulsed laser deposition

Ghidelli

Mascaretti

Bricchi

et al. 2018

Applied Surface Science

View full text Add to dashboard Cite

The synthesis and the optical response of gold nanoparticles (NPs) and thin nanostructured films grown by pulsed laser deposition (PLD) are here studied. Different PLD process parameters-including background gas pressure and the number of laser shots as well as post-deposition annealing treatments-have been varied to control the growth of Au NPs and films, thus tuning the surface plasmon characteristics. The mechanisms of NPs and film growth have been explored performing a morphological characterization by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM), and the correlation with the optical behavior is investigated. We show that the size distribution and the morphology of the as deposited Au NPs depend on growth mechanisms which are controlled by tuning the deposition process, while the optical behavior is strongly affected by the average size and surface density of NPs or by the length of percolated Au domains. Furthermore, nucleation in gas phase has been reported at high (1000 Pa Ar) background pressures, enabling independent control of NP size and coverage, contrary to surface driven NP growth by diffusion and aggregation on substrate.

show abstract

Section: Morphology Of As Deposited Au Nps and Filmssupporting

confidence: 90%

Section: Morphology Of As Deposited Au Nps and Filmssupporting

confidence: 88%

Section: A) Effect Of the Number Of Shots At Fixed Pressuresupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Engineering plasmonic nanostructured surfaces by pulsed laser deposition

Ghidelli

Mascaretti

Bricchi

et al. 2018

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…Therefore, calculation of mass-thickness for 5-45 s deposited samples is done by scaling with deposition time. 45 …”

Section: Methodsmentioning

confidence: 99%

A study of growth and thermal dewetting behavior of ultra-thin gold films using transmission electron microscopy

Sudheer

Mondal

et al. 2017

AIP Advances

View full text Add to dashboard Cite

The growth and solid-state dewetting behavior of Au thin films (0.7 to 8.4 nm) deposited on the formvar film (substrate) by sputtering technique have been studied using transmission electron microscopy. The size and number density of the Au nanoparticles (NPs) change with an increase in the film thickness (0.7 to 2.8 nm). Nearly spherical Au NPs are obtained for <3 nm thickness films whereas percolated nanostructures are observed for ≥3 nm thickness films as a consequence of the interfacial interaction of Au and formvar film. The covered area fraction (CAF) increases from ∼13 to 75 % with the change in film thickness from 0.7 to 8.4 nm. In-situ annealing of ≤3 nm film produces comparatively bigger size and better sphericity Au NPs along with their narrow distributions, whereas just percolated film produces broad distribution in size having spherical as well as elongated Au NPs. The films with thickness ≤3 nm show excellent thermal stability. The films having thickness >6 nm show capability to be used as an irreversible temperature sensor with a sensitivity of ∼0.1 CAF/°C. It is observed that annealing affects the crystallinity of the Au grains in the films. The electron diffraction measurement also shows annealing induced morphological evolution in the percolated Au thin films (≥3 nm) during solid-state dewetting and recrystallization of the grains.

show abstract