Tailoring a periodic metal nanoantenna array using low cost template-assisted lithography

2019 ◽  
Vol 7 (44) ◽  
pp. 13818-13828 ◽  
Author(s):  
Adriano Colombelli ◽  
Daniela Lospinoso ◽  
Antonietta Taurino ◽  
Maria Grazia Manera
Keyword(s):  
Metal Nanoparticles ◽  
Low Cost ◽  
Nanosphere Lithography ◽  
Optical Response ◽  
Simple Approach ◽  
Plasmonic Nanostructures

Tailoring the optical response of metal nanoparticles by controlling their morphology is a key topic in the field of nano-optics. Here, a simple approach for the fabrication of tunable plasmonic nanostructures by nanosphere lithography is presented.

scholarly journals Plasmonic nanostructures fabricated using nanosphere-lithography, soft-lithography and plasma etching

2011 ◽  
Vol 2 ◽  
pp. 448-458 ◽  
Author(s):  
Manuel R Gonçalves ◽  
Taron Makaryan ◽  
Fabian Enderle ◽  
Stefan Wiedemann ◽  
Alfred Plettl ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Soft Lithography ◽  
Low Cost ◽  
Nanosphere Lithography ◽  
Metal Films ◽  
Plasmonic Nanostructures ◽  
Gold Films ◽  
Spectral Position ◽  
Polystyrene Spheres ◽  
Plasmonic Structures

We present two routes for the fabrication of plasmonic structures based on nanosphere lithography templates. One route makes use of soft-lithography to obtain arrays of epoxy resin hemispheres, which, in a second step, can be coated by metal films. The second uses the hexagonal array of triangular structures, obtained by evaporation of a metal film on top of colloidal crystals, as a mask for reactive ion etching (RIE) of the substrate. In this way, the triangular patterns of the mask are transferred to the substrate through etched triangular pillars. Making an epoxy resin cast of the pillars, coated with metal films, allows us to invert the structure and obtain arrays of triangular holes within the metal. Both fabrication methods illustrate the preparation of large arrays of nanocavities within metal films at low cost. Gold films of different thicknesses were evaporated on top of hemispherical structures of epoxy resin with different radii, and the reflectance and transmittance were measured for optical wavelengths. Experimental results show that the reflectivity of coated hemispheres is lower than that of coated polystyrene spheres of the same size, for certain wavelength bands. The spectral position of these bands correlates with the size of the hemispheres. In contrast, etched structures on quartz coated with gold films exhibit low reflectance and transmittance values for all wavelengths measured. Low transmittance and reflectance indicate high absorbance, which can be utilized in experiments requiring light confinement.

scholarly journals A simple approach to prepare fluorescent molecularly imprinted nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (13) ◽  
pp. 7732-7737
Author(s):  
Fenying Wang ◽  
Dan Wang ◽  
Tingting Wang ◽  
Yu Jin ◽  
Baoping Ling ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Sol Gel ◽  
Silica Sol ◽  
Simple Approach ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Low Toxicity ◽  
Good Biocompatibility ◽  
Molecularly Imprinted Nanoparticles

Fluorescent molecularly imprinted polymer (FMIP) gains great attention in many fields due to their low cost, good biocompatibility and low toxicity. Here, a high-performance FMIP was prepared based on the autocatalytic silica sol–gel reaction.

Chiro-optical response of a wafer scale metamaterial with ellipsoidal metal nanoparticles

2021 ◽  
Author(s):  
Akanksha Ninawe ◽  
Priyanka Suri ◽  
Zhuolin Xie ◽  
Xianfan Xu ◽  
Ambarish Ghosh
Keyword(s):  
Metal Nanoparticles ◽  
Optical Response ◽  
Wafer Scale

scholarly journals Optical near-field mapping of plasmonic nanostructures prepared by nanosphere lithography

2018 ◽  
Vol 9 ◽  
pp. 1536-1543 ◽  
Author(s):  
Gitanjali Kolhatkar ◽  
Alexandre Merlen ◽  
Jiawei Zhang ◽  
Chahinez Dab ◽  
Gregory Q Wallace ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Hot Spots ◽  
Near Field ◽  
Nanosphere Lithography ◽  
Plasmonic Nanostructures ◽  
Far Field ◽  
Optical Images ◽  
Spatial Frequencies ◽  
Comparison Of The Results ◽  
Non Destructive

We introduce a simple, fast, efficient and non-destructive method to study the optical near-field properties of plasmonic nanotriangles prepared by nanosphere lithography. Using a rectangular Fourier filter on the blurred signal together with filtering of the lower spatial frequencies to remove the far-field contribution, the pure near-field contributions of the optical images were extracted. We performed measurements using two excitation wavelengths (532.1 nm and 632.8 nm) and two different polarizations. After the processing of the optical images, the distribution of hot spots can be correlated with the topography of the structures, as indicated by the presence of brighter spots at the apexes of the nanostructures. This technique is validated by comparison of the results to numerical simulations, where agreement is obtained, thereby confirming the near-field nature of the images. Our approach does not require any advanced equipment and we suggest that it could be applied to any type of sample, while keeping the measurement times reasonably short.

Localized Laser Sintering of Metal Nanoparticle Inks Printed with Aerosol Jet® Technology for Flexible Electronics

2017 ◽  
Vol 14 (4) ◽  
pp. 132-139 ◽  
Author(s):  
Michael J. Renn ◽  
Matthew Schrandt ◽  
Jaxon Renn ◽  
James Q. Feng
Keyword(s):  
Metal Nanoparticles ◽  
Flexible Electronics ◽  
Low Cost ◽  
Damage Threshold ◽  
Laser Sintering ◽  
Heating Time ◽  
Metal Nanoparticle ◽  
Polymer Materials ◽  
Nanoparticle Inks ◽  
Short Heating Time

Direct-write methods, such as the Aerosol Jet® technology, have enabled fabrication of flexible multifunctional 3-D devices by printing electronic circuits on thermoplastic and thermoset polymer materials. Conductive traces printed by additive manufacturing typically start in the form of liquid metal nanoparticle inks. To produce functional circuits, the printed metal nanoparticle ink material must be postprocessed to form conductive metal by sintering at elevated temperature. Metal nanoparticles are widely used in conductive inks because they can be sintered at relatively low temperatures compared with the melting temperature of bulk metal. This is desirable for fabricating circuits on low-cost plastic substrates. To minimize thermal damage to the plastics, while effectively sintering the metal nanoparticle inks, we describe a laser sintering process that generates a localized heat-affected zone (HAZ) when scanning over a printed feature. For sintering metal nanoparticles that are reactive to oxygen, an inert or reducing gas shroud is applied around the laser spot to shield the HAZ from ambient oxygen. With the shroud gas-shielded laser, oxygen-sensitive nanoparticles, such as those made of copper and nickel, can be successfully sintered in open air. With very short heating time and small HAZ, the localized peak sintering temperature can be substantially higher than that of damage threshold for the underlying substrate, for effective metallization of nanoparticle inks. Here, we demonstrate capabilities for producing conductive tracks of silver, copper, and copper–nickel alloys on flexible films as well as fabricating functional thermocouples and strain gauge sensors, with printed metal nanoparticle inks sintered by shroud-gas-shielded laser.

Optical properties of magnesium nanorods using time dependent density functional theory calculations

2018 ◽  
Vol 20 (45) ◽  
pp. 28903-28909 ◽  
Author(s):  
Junais Habeeb Mokkath
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Low Cost ◽  
Density Functional Theory Calculations ◽  
Time Dependent ◽  
Plasmonic Nanostructures ◽  
Functional Theory ◽  
Earth Abundant ◽  
Potential Alternative ◽  
Dependent Density

Plasmonic nanostructures made of Earth-abundant and low-cost metals such as aluminum and magnesium have recently emerged as a potential alternative candidate to conventional plasmonic metals such as gold and silver.

Inside Front Cover: Modeling the Optical Response of Highly Faceted Metal Nanoparticles with a Fully 3D Boundary Element Method (Adv. Mater. 22/2008)

2008 ◽  
Vol 20 (22) ◽  
pp. NA-NA
Author(s):  
Viktor Myroshnychenko ◽  
Enrique Carbó-Argibay ◽  
Isabel Pastoriza-Santos ◽  
Jorge Pérez-Juste ◽  
Luis M. Liz-Marzán ◽  
...  
Keyword(s):  
Boundary Element Method ◽  
Metal Nanoparticles ◽  
Boundary Element ◽  
Optical Response ◽  
Front Cover ◽  
Element Method

Nonlocal Effects in the Optical Response of Metal Nanoparticles

2010 ◽  
Author(s):  
Christin David ◽  
F. Javier García de Abajo ◽  
Dmitry N. Chigrin
Keyword(s):  
Metal Nanoparticles ◽  
Optical Response ◽  
Nonlocal Effects

Combination of Nanoholes with Metal Nanoparticles–Fabrication and Characterization of Novel Plasmonic Nanostructures

Plasmonics ◽  
2006 ◽  
Vol 1 (2-4) ◽  
pp. 147-155 ◽  
Author(s):  
Andrea Csáki ◽  
Andrea Steinbrück ◽  
Siegmund Schröter ◽  
Wolfgang Fritzsche
Keyword(s):  
Metal Nanoparticles ◽  
Plasmonic Nanostructures ◽  
Fabrication And Characterization

scholarly journals Localized Surface Plasmons Enhanced Light Transmission into c-Silicon Solar Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Y. Premkumar Singh ◽  
Amit Jain ◽  
Avinashi Kapoor
Keyword(s):  
Solar Cells ◽  
Metallic Nanoparticles ◽  
Large Scale ◽  
Light Transmission ◽  
Low Cost ◽  
Incident Light ◽  
Solar Spectrum ◽  
Localized Surface Plasmon ◽  
Plasmonic Nanostructures ◽  
Al Nanoparticles

The paper investigates the light incoupling into c-Si solar cells due to the excitation of localized surface plasmon resonances in periodic metallic nanoparticles by finite-difference time-domain (FDTD) technique. A significant enhancement of AM1.5G solar radiation transmission has been demonstrated by depositing nanoparticles of various metals on the upper surface of a semi-infinite Si substrate. Plasmonic nanostructures located close to the cell surface can scatter incident light efficiently into the cell. Al nanoparticles were found to be superior to Ag, Cu, and Au nanoparticles due to the improved transmission of light over almost the entire solar spectrum and, thus, can be a potential low-cost plasmonic metal for large-scale implementation of solar cells.

Sign in / Sign up

Export Citation Format

Share Document