Short Gold Nanorod Growth Revisited: The Critical Role of the Bromide Counterion

ChemPhysChem ◽  
2011 ◽  
Vol 13 (1) ◽  
pp. 193-202 ◽  
Author(s):  
Satyabrata Si ◽  
Cecile Leduc ◽  
Marie-Hélène Delville ◽  
Brahim Lounis
Keyword(s):  
Critical Role ◽  
Gold Nanorod ◽  
Nanorod Growth

Optimizing Seed Aging for Single Crystal Gold Nanorod Growth: The Critical Role of Gold Nanocluster Crystal Structure

2016 ◽  
Vol 120 (49) ◽  
pp. 28235-28245 ◽  
Author(s):  
Kyoungweon Park ◽  
Ming-Siao Hsiao ◽  
Hilmar Koerner ◽  
Ali Jawaid ◽  
Justin Che ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Critical Role ◽  
Gold Nanorod ◽  
Gold Nanocluster ◽  
Seed Aging ◽  
Nanorod Growth

scholarly journals Gold Nanorod Assemblies: The Roles of Hot-Spot Positioning and Anisotropy in Plasmon Coupling and SERS

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 942 ◽  
Author(s):  
Priyanka Dey ◽  
Verena Baumann ◽  
Jessica Rodríguez-Fernández
Keyword(s):  
Hot Spots ◽  
Hot Spot ◽  
Critical Role ◽  
Gold Nanorod ◽  
Plasmon Coupling ◽  
Surface Enhanced ◽  
Sybr Gold ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Plasmon-coupled colloidal nanoassemblies with carefully sculpted “hot-spots” and intense surface-enhanced Raman scattering (SERS) are in high demand as photostable and sensitive plasmonic nano-, bio-, and chemosensors. When maximizing SERS signals, it is particularly challenging to control the hot-spot density, precisely position the hot-spots to intensify the plasmon coupling, and introduce the SERS molecule in those intense hot-spots. Here, we investigated the importance of these factors in nanoassemblies made of a gold nanorod (AuNR) core and spherical nanoparticle (AuNP) satellites with ssDNA oligomer linkers. Hot-spot positioning at the NR tips was made possible by selectively burying the ssDNA in the lateral facets via controlled Ag overgrowth while retaining their hybridization and assembly potential at the tips. This strategy, with slight alterations, allowed us to form nanoassemblies that only contained satellites at the NR tips, i.e., directional anisotropic nanoassemblies; or satellites randomly positioned around the NR, i.e., nondirectional nanoassemblies. Directional nanoassemblies featured strong plasmon coupling as compared to nondirectional ones, as a result of strategically placing the hot-spots at the most intense electric field position of the AuNR, i.e., retaining the inherent plasmon anisotropy. Furthermore, as the dsDNA was located in these anisotropic hot-spots, this allowed for the tag-free detection down to ~10 dsDNA and a dramatic SERS enhancement of ~1.6 × 108 for the SERS tag SYBR gold, which specifically intercalates into the dsDNA. This dramatic SERS performance was made possible by manipulating the anisotropy of the nanoassemblies, which allowed us to emphasize the critical role of hot-spot positioning and SERS molecule positioning in nanoassemblies.

The Role of the SLP in Autism Spectrum Disorder Screening and Assessment

2008 ◽  
Vol 15 (2) ◽  
pp. 50-59 ◽  
Author(s):  
Amy Philofsky
Keyword(s):  
Language Development ◽  
Critical Role ◽  
Children With Autism ◽  
Autism Spectrum ◽  
Children With Asd ◽  
Prevalence Estimates ◽  
Notable Increase ◽  
Screening Assessment ◽  
Critical Components

AbstractRecent prevalence estimates for autism have been alarming as a function of the notable increase. Speech-language pathologists play a critical role in screening, assessment and intervention for children with autism. This article reviews signs that may be indicative of autism at different stages of language development, and discusses the importance of several psychometric properties—sensitivity and specificity—in utilizing screening measures for children with autism. Critical components of assessment for children with autism are reviewed. This article concludes with examples of intervention targets for children with ASD at various levels of language development.

A critical role of iNOS-derived Nitric Oxide (NO) and progesterone in implantation

1998 ◽  
Vol 5 (1) ◽  
pp. 115A-115A
Author(s):  
K CHWALISZ ◽  
E WINTERHAGER ◽  
T THIENEL ◽  
R GARFIELD
Keyword(s):  
Nitric Oxide ◽  
Critical Role

Bridging the Gap between Ethical Climate and Nurses’ Service Behaviors: the Critical Role of Professional Well-Being

2018 ◽  
Vol 20 (3) ◽  
pp. 99-110
Author(s):  
Na Zhang ◽  
Jingjing Li ◽  
Xing Bu ◽  
Zhenxing Gong ◽  
Gilal Faheem Gul
Keyword(s):  
Ethical Climate ◽  
Critical Role ◽  
Well Being
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