2D nanoplasmonic substrates excited in transmission spectroscopy are ideal for several biosensing, metamaterial, and optical applications. We show that their excellent properties can be further improved with plasmonic coupling of Au nanoparticles (AuNPs) on gold-coated nanodisk arrays excited at large incidence angles of up to 50°. The Bragg modes (BM) thereby strongly couple to AuNP immobilized on the plasmonic substrate due to shorter decay length of the plasmon at higher incidence angles, leading to a further enhanced field between the AuNP and the plasmonic substrate. The field was highest and two hotspots were created at orthogonal positions for AuNP located close to the corner of the Au film and Au nanodisk, which was also observed for AuNP dimers. Hybridization between single-stranded DNA (ssDNA) immobilized on the surface of the AuNPs and the capture ssDNA on the gold-coated nanodisk arrays led to at least a 5-fold signal improvement and a 7-fold lower limit of detection at 7 pM for ssDNA-functionalized AuNPs at large incident angles. Thus, we demonstrate that higher field strength can be accessed and the significant advantages of working with high incidence angles with AuNP on a 2D plasmonic crystal in plasmonic sensing.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.analchem.8b00496 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Factors associated with the time of glaucoma-related adverse events onset after pediatric cataract surgery and the preferred anti-glaucomatous surgical selection.
Int Ophthalmol
January 2025
Department of Ophthalmology and Visual Science, Eye and ENT Hospital, Shanghai Medical College, Fudan University, 83 Fenyang Road, Shanghai, 200031, China.
Purpose: To describe the clinical characteristics of glaucoma-related adverse events (GRAE) after pediatric cataract surgery. More importantly, to identify the factors associated with the time of GRAE onset and the preferred anti-glaucomatous surgical procedure for this disease.
Methods: Hospitalized medical records of patients who developed GRAE, which include glaucoma and glaucoma suspect, after pediatric cataract surgery (surgical age ≤ 14 years) between 1994 and 2021 were retrospectively reviewed.
The impact of bifurcation angle on clinical outcomes in patients who underwent nano-crush technique: the insight from the multicenter EVOLUTE-CRUSH V study.
Coron Artery Dis
January 2025
Department of Cardiology, Istanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital.
Background: This multicenter study aimed to retrospectively assess the relationship between bifurcation angle (BA) and major cardiovascular events (MACEs) in patients undergoing nano-crush technique (NCT) for complex bifurcation lesions (CBLs).
Methods: A total of 122 consecutive patients [male: 85 (69.6%), mean age: 61.
Endoscopic Treatment of Chronic Plantar Fasciitis with Plantar Heel Spur Pain: A Combined Suprafascial and Infrafascial Approach.
Foot Ankle Int
January 2025
Sirindhorn Hospital, Bangkok Metropolitan Administration, Bangkok, Thailand.
Background: To determine whether a combined endoscopic suprafascial and infrafascial approach with medial and lateral portals is a safe and effective technique for the endoscopic treatment of chronic plantar fasciitis with plantar heel spur pain.
Methods: An interventional, prospective study was conducted. A total of 61 patients with plantar fasciitis with plantar heel spur pain underwent an endoscopic plantar fasciotomy with plantar heel spur resection, using a combined suprafascial and infrafascial approach between January 2018 and August 2022.
A meta-analysis of the effectiveness and side effects of hip arthroscopy and open surgical dislocation in the management of femoroacetabular impingement.
BMC Musculoskelet Disord
January 2025
Department of Orthopedics, the Second Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang Province, 314001, China.
Background: The influence of femoroacetabular (FA) impingement has been implied in early hip osteoarthritis, particularly in young patients who enjoy athletics. The purpose of this meta-analysis is to assess the effectiveness and safety of hip arthroscopy compared to open surgical dislocation for the treatment of femoroacetabular impingement (FAI), based on clinical trials that have been published.
Methods: A comprehensive literature search was conducted through PUBMED, EMBASE, and the Cochrane Central Register of Controlled Trials for studies evaluating coxoscopy and open surgical dislocation as treatment modalities for femoroacetabular impingement syndrome (FAI).
Abrupt lateral beam shifts from terahertz quasi-bound states in the continuum.
Sci Bull (Beijing)
January 2025
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore; Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore 639798, Singapore. Electronic address:
Bound states in the continuum (BICs) are notable in photonics for their infinite Q factors. Perturbed BICs, or quasi-BICs (QBICs), have finite but ultra-high Q factors, enabling external coupling. So far, most studies have focused on the momentum-space properties of BICs and QBICs, with few discussions on their properties in real space.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!