scholarly journals Symmetry Breaking in Tetrahedral Chiral Plasmonic Nanoparticle Assemblies

ACS Photonics ◽  
2014 ◽  
Vol 1 (11) ◽  
pp. 1189-1196 ◽  
Author(s):  
Vivian E. Ferry ◽  
Jessica M. Smith ◽  
A. Paul Alivisatos
Keyword(s):  
Symmetry Breaking ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies

scholarly journals Deterministic temperature shaping using plasmonic nanoparticle assemblies

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8984-8989 ◽  
Author(s):  
Guillaume Baffou ◽  
Esteban Bermúdez Ureña ◽  
Pascal Berto ◽  
Serge Monneret ◽  
Romain Quidant ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Temperature Field ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies

We developed a technique based on the use of smart patterns of gold nanoparticles under illumination to generate any temperature field on the microscale.

scholarly journals Multiplexed and single-cell detection of microRNA with plasmonic nanoparticle assemblies

2021 ◽  
Author(s):  
Gurbrinder Ghotra ◽  
Nguyen Le ◽  
Heyam Hayder ◽  
Chun Peng ◽  
Jennifer I. L. Chen
Keyword(s):  
Nucleic Acid ◽  
Single Cell ◽  
Low Cost ◽  
Single Cells ◽  
Cell Detection ◽  
Label Free ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies ◽  
Single Cell Detection ◽  
Target Binding

We present a label-free, low cost and miniatured biosensing platform based on the disassembly of core-satellite plasmonic nanoparticle assemblies. The rapid and selective detection of an exemplary nucleic acid biomarker, has-miRNA-210-3p, was achieved via the strand displacement nucleic acid reaction. Target binding leads to dehybridization of the DNA linkers and changes in the scattering properties of nanostructures as monitored by darkfield microscopy. We demonstrate the ability to detect microRNA expunged from single cells and the potential to multiplex discrete assemblies to enable diverse biological applicability. The work may help translate the applicability of microRNA as diagnostic biomarkers, quantitate their abundance in the microenvironment, and facilitate the study of their correlation or causation to other biomolecules at the single-cell level.

Interparticle Gap Geometry Effects on Chiroptical Properties of Plasmonic Nanoparticle Assemblies

2021 ◽  
Author(s):  
Feng Li ◽  
Skandan Chandrasekar ◽  
Aftab Ahmed ◽  
Anna Klinkova
Keyword(s):  
Rational Design ◽  
Incident Light ◽  
Structure Property ◽  
Large Area ◽  
Chiroptical Properties ◽  
Plasmonic Nanoparticle ◽  
Face To Face ◽  
Nanoparticle Assemblies ◽  
Systematic Understanding ◽  
Difference Time

Abstract Chiral linear assemblies of plasmonic nanoparticles with chiral optical activity often show low asymmetry factors. Systematic understanding of the structure-property relationship in these systems must be improved to facilitate rational design of their chiroptical response. Here we study the effect of large-area interparticle gaps in chiral linear nanoparticle assemblies on their chiroptical properties using a tetrahelix structure formed by a linear face-to-face assembly of nanoscale Au tetrahedra. Using finite-difference time-domain and finite element methods, we performed in-depth evaluation of the extinction spectra and electric field distribution in the tetrahelix structure and its dependence on various geometric parameters. The reported structure supports various plasmonic modes, one of which shows a strong incident light handedness selectivity that is associated with large face-to-face junctions. This works highlights the importance of gap engineering in chiral plasmonic assemblies to achieve g-factors greater than 1 and produce structures with a handedness-selective optical response.

scholarly journals Hierarchically Structured Plasmonic Nanoparticle Assemblies with Dual-Length Scale Electromagnetic Hot Spots for Enhanced Sensitivity in the Detection of (Bio)Molecular Analytes

2021 ◽  
Vol 125 (16) ◽  
pp. 8647-8655
Author(s):  
Rishabh Rastogi ◽  
Ekoue A. Dogbe Foli ◽  
Remi Vincent ◽  
Suresh Poovathingal ◽  
Pierre-Michel Adam ◽  
...  
Keyword(s):  
Hot Spots ◽  
Length Scale ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies ◽  
Enhanced Sensitivity

scholarly journals Metabolic mapping with plasmonic nanoparticle assemblies

The Analyst ◽  
2020 ◽  
Vol 145 (7) ◽  
pp. 2586-2594 ◽  
Author(s):  
Nguyen H. Le ◽  
Gang Ye ◽  
Chun Peng ◽  
Jennifer I. L. Chen
Keyword(s):  
Gold Nanoparticle ◽  
Single Cells ◽  
Metabolic Mapping ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies

Discrete plasmonic gold nanoparticle assemblies rapidly detect ATP in single cells and microenvironments without labelling, extraction, purification or separation.

Design of Magnetic‐Plasmonic Nanoparticle Assemblies via Interface Engineering of Plasmonic Shells for Targeted Cancer Cell Imaging and Separation

Small ◽  
2020 ◽  
Vol 16 (20) ◽  
pp. 2001103 ◽  
Author(s):  
Myeong Soo Kim ◽  
Bum Chul Park ◽  
Yu Jin Kim ◽  
Ju Hun Lee ◽  
Thomas Myeongseok Koo ◽  
...  
Keyword(s):  
Cancer Cell ◽  
Cell Imaging ◽  
Interface Engineering ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Assemblies ◽  
Cancer Cell Imaging
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