scholarly journals Chemosensing on Miniaturized Plasmonic Substrates

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 275
Author(s):  
Pengcheng Wang ◽  
Rodica Elena Ionescu
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Localized Surface Plasmon Resonance ◽  
Thin Layers ◽  
Localized Surface Plasmon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Model Molecule ◽  
First Time ◽  
Scanning Electron

Round, small-sized coverslips were coated for the first time with thin layers of indium tin oxide (ITO, 10–40 nm)/gold (Au, 2–8 nm) and annealed at 550 °C for several hours. The resulting nanostructures on miniaturized substrates were further optimized for the localized surface plasmon resonance (LSPR) chemosensing of a model molecule—1,2-bis-(4-ppyridyl)-ethene (BPE)—with a detection limit of 10−12 M BPE in an aqueous solution. All the fabrication steps of plasmonic-annealed platforms were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM).

scholarly journals Plasmonic Photomobile Polymer Films

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 660
Author(s):  
Riccardo Castagna ◽  
Massimo Rippa ◽  
Francesco Simoni ◽  
Fulvia Villani ◽  
Giuseppe Nenna ◽  
...  
Keyword(s):  
Polymer Films ◽  
Localized Surface Plasmon Resonance ◽  
Dark Field ◽  
Localized Surface Plasmon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Plasmonic Nanostructure ◽  
Dark Field Microscopy ◽  
Scanning Electron

In this work, we introduce the approaches currently followed to realize photomobile polymer films and remark on the main features of the system based on a biphasic structure recently proposed. We describe a method of making a plasmonic nanostructure on the surface of photomobile films. The characterization of the photomobile film is performed by means of Dark Field Microscopy (DFM), Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM). Preliminary observations of the light-induced effects on the Localized Surface Plasmon Resonance are also reported.

scholarly journals Microwave Spectroscopic Detection of Human Hsp70 Protein on Annealed Gold Nanostructures on ITO Glass Strips

Biosensors ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 118
Author(s):  
Rodica Ionescu ◽  
Raphael Selon ◽  
Nicolas Pocholle ◽  
Lan Zhou ◽  
Anna Rumyantseva ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Stress Disorders ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Conductive Glass ◽  
Hsp70 Protein ◽  
Atomic Force ◽  
Ito Glass ◽  
First Time ◽  
Human Heat Shock Protein

Conductive indium-tin oxide (ITO) and non-conductive glass substrates were successfully modified with embedded gold nanoparticles (AuNPs) formed by controlled thermal annealing at 550 °C for 8 h in a preselected oven. The authors characterized the formation of AuNPs using two microscopic techniques: scanning electron microscopy (SEM) and atomic force microscopy (AFM). The analytical performances of the nanostructured-glasses were compared regarding biosensing of Hsp70, an ATP-driven molecular chaperone. In this work, the human heat-shock protein (Hsp70), was chosen as a model biomarker of body stress disorders for microwave spectroscopic investigations. It was found that microwave screening at 4 GHz allowed for the first time the detection of 12 ng/µL/cm2 of Hsp70.

New insight into SPR modulating by two-dimensional correlation spectroscopy: the case for an Ag/ITO system

Nanoscale ◽  
2020 ◽  
Vol 12 (48) ◽  
pp. 24357-24361
Author(s):  
Bingbing Han ◽  
Sila Jin ◽  
Qi Chu ◽  
Yang Jin ◽  
Xiangxin Xue ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Localized Surface Plasmon Resonance ◽  
Carrier Density ◽  
Correlation Spectroscopy ◽  
Localized Surface Plasmon ◽  
Two Dimensional ◽  
System P ◽  
Insight Into

The localized surface plasmon resonance (LSPR) of Ag/indium tin oxide (ITO)@polystyrene (PS) in the visible-NIR region was dependent on the tuning of the carrier density caused by adjusting the thickness of the ITO layer.

Transparent Conducting Indium-Tin-Oxide Thin Film with Extremely Flatted Surface

2001 ◽  
Vol 666 ◽  
Author(s):  
Hiromichi Ohta ◽  
Masahiro Orita ◽  
Masahiro Hirano ◽  
Hideo Hosono
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Film Growth ◽  
Oxide Thin Film ◽  
Force Microscopy ◽  
Atomic Force ◽  
Out Of Plane ◽  
Key Factor ◽  
Surface Microstructures

ABSTRACTIndium-tin-oxide films were grown hetero-epitaxially on YSZ surface at a substrate temperature of 900 °C, and their surface microstructures were observed by using atomic force microscopy. ITO films grown on (111) surface of YSZ exhibited very high crystal quality; full width at half maximum of out-of-plane rocking curve was 54 second. The ITO was grown spirally, with flat terraces and steps corresponding to (222) plane spacing of 0.29 nm. Oxygen pressure during film growth is another key factor to obtain atomically flat surfaced ITO thin film.

scholarly journals Characterization and Electronic Properties of Heptazine Layers: Towards Promising Interfacial Materials for Organic Optoelectronics

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3826
Author(s):  
Issoufou Ibrahim Zamkoye ◽  
Houda El Gbouri ◽  
Remi Antony ◽  
Bernard Ratier ◽  
Johann Bouclé ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Energy Levels ◽  
Thin Layers ◽  
Kelvin Probe ◽  
Conductive Atomic Force Microscopy ◽  
Force Microscopy ◽  
Organic Optoelectronics ◽  
Atomic Force ◽  
Force Mode ◽  
First Time

For the first time, an original compound belonging to the heptazine family has been deposited in the form of thin layers, both by thermal evaporation under vacuum and spin-coating techniques. In both cases, smooth and homogeneous layers have been obtained, and their properties evaluated for eventual applications in the field of organic electronics. The layers have been fully characterized by several concordant techniques, namely UV-visible spectroscopy, steady-state and transient fluorescence in the solid-state, as well as topographic and conductive atomic force microscopy (AFM) used in Kelvin probe force mode (KPFM). Consequently, the afferent energy levels, including Fermi level, have been determined, and show that these new heptazines are promising materials for tailoring the electronic properties of interfaces associated with printed electronic devices. A test experiment showing an improved electron transfer rate from a tris-(8-hydroxyquinoline) aluminum (Alq3) photo-active layer in presence of a heptazine interlayer is finally presented.

Fabrication and Applications of Ordered Au Nanodisk and Nanohole Arrays

2010 ◽  
Author(s):  
Tieyu Gao ◽  
Yue Bing Zheng ◽  
Bala Krishna Juluri ◽  
Tony Jun Huang
Keyword(s):  
Localized Surface Plasmon Resonance ◽  
Low Cost ◽  
Nano Particles ◽  
Localized Surface Plasmon ◽  
Microfluidic Channels ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Nanohole Arrays ◽  
Nanofabrication Technique

We have fabricate ordered Au nanodisk and nanohole arrays on glass substrates using nanosphere lithography (NSL) combined with reactive ion etching (RIE) techniques. The morphology and size distribution of the Au nanodisks and nanoholes were examined with scanning electron microscopy (SEM) and atomic force microscopy (AFM). The sensitivity of the localized surface plasmon resonance (LSPR) of the Au nanodisk arrays to change in the surroundings’ refractive index was evaluated by integrating the Au nanodisk arrays into microfluidic channels. In addition, we show that the NSL-fabricated Au nanohole arrays can be applied as templates for patterning micro-/nano-particles under capillary force. The unique structural and optical characteristics of the Au nanodisk and nanohole arrays, as well as the low-cost and high-throughput of NSL-based nanofabrication technique, render these arrays excellent platforms for numerous engineering applications.

scholarly journals Electrodeposited copper on indium tin oxide. Reaction and nucleation mechanisms

2018 ◽  
Vol 1 (1) ◽  
pp. 565-571
Author(s):  
Zouaoui Ahmed
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Active Sites ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Diffusion Controlled ◽  
Instantaneous Nucleation ◽  
Nucleation Mechanisms ◽  
Current Transients

In this paper, we report on an analysis carried out by using cyclic voltammetric (CV) and chronoamperometric (CA) techniques on the reaction and nucleation mechanisms of electrodeposited copper on indium-doped tin oxide (ITO)-coated glass substrates from sulfate solutions. The present investigation has been performed in an acid solution at pH 5. The Scharifker and Hills model were used to analyze current transients. At relatively low overpotentials, the copper deposition can be described by a model involving instantaneous nucleation on active sites and diffusion-controlled 3D growth. The values of diffusion coefficient D for Cu2+ ions are estimated. Atomic force microscopy (AFM) has been used to check on the samples’ surface morphology.

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