Comparison and Evaluation of Silver Probe Preparation Techniques for Tip-Enhanced Raman Spectroscopy

Ramanauskaite, Lina; Xu, Huizhong; Griškonis, Egidijus; Batiuškaitė, Danutė; Snitka, Valentinas

doi:10.1007/s11468-018-0705-7

Cited by 11 publications

(9 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further control of tip pressure on the sample was accomplished by tuning the AFM feedback signal set point. The exposure time for the collection of all Raman spectra was 1 s. The tip used for TERS measurements was a bulk metal Ag probe made by electrochemical etching of Ag microwires using a Pt cathode, filled with a film of 8 M NH 4 NO 3 aqueous solution and DC voltage 2.0 V, following the methodology developed by [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

Influence of TiO2 and ZnO Nanoparticles on α-Synuclein and β-Amyloid Aggregation and Formation of Protein Fibrils

et al. 2022

View full text Add to dashboard Cite

The most common neurological disorders, i.e., Parkinson’s disease (PD) and Alzheimer’s disease (AD), are characterized by degeneration of cognitive functions due to the loss of neurons in the central nervous system. The aggregation of amyloid proteins is an important pathological feature of neurological disorders.The aggregation process involves a series of complex structural transitions from monomeric to the formation of fibrils. Despite its potential importance in understanding the pathobiology of PD and AD diseases, the details of the aggregation process are still unclear. Nanoparticles (NPs) absorbed by the human circulatory system can interact with amyloid proteins in the human brain and cause PD. In this work, we report the study of the interaction between TiO2 nanoparticles (TiO2-NPs) and ZnO nanoparticles (ZnO-NPs) on the aggregation kinetics of β-amyloid fragment 1-40 (βA) and α-synuclein protein using surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS). The characterizations of ZnO-NPs and TiO2-NPs were evaluated by X-ray diffraction (XRD) spectrum, atomic force microscopy (AFM), and UV-Vis spectroscopy. The interaction of nanoparticles with amyloid proteins was investigated by SERS. Our study showed that exposure of amyloid protein molecules to TiO2-NPs and ZnO-NPs after incubation at 37 °C caused morphological changes and stimulated aggregation and fibrillation. In addition, significant differences in the intensity and location of active Raman frequencies in the amide I domain were found. The principal component analysis (PCA) results show that the effect of NPs after incubation at 4 °C does not cause changes in βA structure.

show abstract

Section: Methodsmentioning

confidence: 99%

Influence of TiO2 and ZnO Nanoparticles on α-Synuclein and β-Amyloid Aggregation and Formation of Protein Fibrils

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The eponymous tip used in TERS experiments is paramount and as such, extensive research has been conducted into fabrication methods and quite a few reviews have focused on these developments. [82][83][84][85][86][87][88] A review focused on the role of a TERS tip as a nanoantenna is also available. 89 As a result, we will focus our evaluation of tiprelated developments to a broad survey of the current state of methods alongside a focus on novel or atypical advances.…”

Section: Tip Fabrication and Modificationmentioning

confidence: 99%

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

Schultz

Mahapatra

et al. 2020

Appl Spectrosc

View full text Add to dashboard Cite

“…In order to obtain high quality nano-tips, a variety of fabrication techniques, such as vacuum/chemical deposition on commercial silicon cantilever probes [15][16][17], template stripping [18][19][20], electrochemical etching [17,[21][22][23], etc, have been widely discussed. Metal-coated tips with different radius of curvature (ROC) have been successfully produced via vacuum/chemical deposition of metal ions on commercial silicon cantilever probes [15].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have also improved the apex structural consistency of metal tips by optimizing the experimental setup [21][22][23]26]. In order to obtain a cantilever probe, additional steps, such as the compression of the metal wires to obtain the cantilever component, the insulation of the cantilever component by electrodeposition of paint, and then the heat curing of the paint, are needed [27][28][29], which increases the complexity of the fabrication process. A new microfabrication process based on a double mold of an anisotropically etched silicon tip was proposed to fulfill a mass production of identical tips having tip radii less than 30 nm [30].…”

Section: Introductionmentioning

confidence: 99%

Facile and scalable fabrication of Ni cantilever nanoprobes using silicon template and micro-electroforming techniques for nano-tip focused electrohydrodynamic jet printing

Liang

et al. 2020

Nanotechnology

View full text Add to dashboard Cite

Electrohydrodynamic jet (E-Jet) printing is a powerful technique for micro/nanostructure fabrication with high resolution and efficiency. However, conventional E-Jet printing are still limited in printing accuracy and ink adaptability due to the nozzle clogging effect. In this paper, we develop a nano-tip focused electrohydrodynamic jet (NFEJ) method to print high-resolution structures. The Ni cantilever nanoprobes with nanoscale radius of curvature (ROC) on their tips were manufactured by a facile and scalable method using silicon template and micro-electroforming technique. Scanning electron microscope was used to analyse the micromorphology of the silicon template with inverted pyramid pits, which was obtained from anisotropic wet etching of silicon. Electroforming mold was obtained by photolithography and plasma etching which divide the top side of Ni film into isolated cantilever pits. Ni cantilever nanoprobes with an average tip ROC of about 48 nm were achieved by the subsequent micro electroforming process. High-resolution droplets array with an average diameter of about 890 ± 93 nm were printed by the NFEJ printing head equipped with these Ni nanoprobes, which verified the practicality of the developed Ni nanoprobes for NFEJ printing.

show abstract

Comparison and Evaluation of Silver Probe Preparation Techniques for Tip-Enhanced Raman Spectroscopy

Cited by 11 publications

References 60 publications

Influence of TiO2 and ZnO Nanoparticles on α-Synuclein and β-Amyloid Aggregation and Formation of Protein Fibrils

Influence of TiO2 and ZnO Nanoparticles on α-Synuclein and β-Amyloid Aggregation and Formation of Protein Fibrils

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

Facile and scalable fabrication of Ni cantilever nanoprobes using silicon template and micro-electroforming techniques for nano-tip focused electrohydrodynamic jet printing

Contact Info

Product

Resources

About