Plasmonic nanospheres with a handle—Local electrochemical deposition of Au or Ag at the apex of optically inactive W- or C-tips

Ma, Xiaoxue; Grüßer, Martin; Schuster, Rolf

doi:10.1063/1.4922639

Cited by 8 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…180 Some common alternative methods for AFM−TERS tip fabrication include functionalizing AFM tips with single Au nanoparticles 180−183 and electrodeposition of Ag and Au. 178,184,185 The use of commercially available Au-coated AFM tips for TERS has also been reported. 161,186 Tuning-fork-based AFM (shear force microscopy, SFM) has also been extensively used as a TERS platform.…”

Section: Afm and Stm Tip Fabricationmentioning

confidence: 99%

“…In AFM–TERS, the most common fabrication method for producing tips is thermal evaporation of Ag or Au onto a commercial Si or SiN AFM probe. ,,, The deposition thickness for Ag varies widely in the literature, generally in the range of 20–70 nm. , However, Au AFM tips are used far less frequently in the AFM–TERS literature, with the optimal thickness reportedly in the range of 50–80 nm. , Aluminum tips have also been fabricated using thermal evaporation for deep-ultraviolet (UV) TERS studies . Some common alternative methods for AFM–TERS tip fabrication include functionalizing AFM tips with single Au nanoparticles − and electrodeposition of Ag and Au. ,, The use of commercially available Au-coated AFM tips for TERS has also been reported. , Tuning-fork-based AFM (shear force microscopy, SFM) has also been extensively used as a TERS platform. In general, tip fabrication for SFM experiments is identical to those discussed above for STM experiments, with the resulting tip then attached to a tuning fork. ,, Batch fabrication methods have also been developed to increase tip reproducibility.…”

Section: Single-molecule and High-resolution Tersmentioning

confidence: 99%

See 1 more Smart Citation

Single-Molecule Chemistry with Surface- and Tip-Enhanced Raman Spectroscopy

et al. 2016

View full text Add to dashboard Cite

Single-molecule (SM) surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS) have emerged as analytical techniques for characterizing molecular systems in nanoscale environments. SERS and TERS use plasmonically enhanced Raman scattering to characterize the chemical information on single molecules. Additionally, TERS can image single molecules with subnanometer spatial resolution. In this review, we cover the development and history of SERS and TERS, including the concept of SERS hot spots and the plasmonic nanostructures necessary for SM detection, the past and current methodologies for verifying SMSERS, and investigations into understanding the signal heterogeneities observed with SMSERS. Moving on to TERS, we cover tip fabrication and the physical origins of the subnanometer spatial resolution. Then, we highlight recent advances of SMSERS and TERS in fields such as electrochemistry, catalysis, and SM electronics, which all benefit from the vibrational characterization of single molecules. SMSERS and TERS provide new insights on molecular behavior that would otherwise be obscured in an ensemble-averaged measurement.

show abstract

Section: Afm and Stm Tip Fabricationmentioning

confidence: 99%

Section: Single-molecule and High-resolution Tersmentioning

confidence: 99%

Single-Molecule Chemistry with Surface- and Tip-Enhanced Raman Spectroscopy

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In addition, Kim et al demonstrated in situ growth of a Ag-coated Au nanoparticle at the apex of an AFM tip . Finally, electrochemical deposition of plasmonic nanoparticles at the conductive apex of a nanoprobe enables reproducible tips whose optical properties can be tailored. , Such methods allow researchers to tailor physical properties of constructed tips, such as plasmon frequency, for particular applications.…”

Section: Tersmentioning

confidence: 99%

Ultrahigh-Vacuum Tip-Enhanced Raman Spectroscopy

Pozzi¹,

Goubert²,

Chiang³

et al. 2016

Chem. Rev.

137

107

View full text Add to dashboard Cite

Molecule-surface interactions and processes are at the heart of many technologies, including heterogeneous catalysis, organic photovoltaics, and nanoelectronics, yet they are rarely well understood at the molecular level. Given the inhomogeneous nature of surfaces, molecular properties often vary among individual surface sites, information that is lost in ensemble-averaged techniques. In order to access such site-resolved behavior, a technique must possess lateral resolution comparable to the size of surface sites under study, analytical power capable of examining chemical properties, and single-molecule sensitivity. Tip-enhanced Raman spectroscopy (TERS), wherein light is confined and amplified at the apex of a nanoscale plasmonic probe, meets these criteria. In ultrahigh vacuum (UHV), TERS can be performed in pristine environments, allowing for molecular-resolution imaging, low-temperature operation, minimized tip and molecular degradation, and improved stability in the presence of ultrafast irradiation. The aim of this review is to give an overview of TERS experiments performed in UHV environments and to discuss how recent reports will guide future endeavors. The advances made in the field thus far demonstrate the utility of TERS as an approach to interrogate single-molecule properties, reactions, and dynamics with spatial resolution below 1 nm.

show abstract

“…Ma et al reported a method for the local deposition of spherical Au or Ag onto optically inactive W- or C- tips, which is achieved by the local charging of the electrodes with short pulses and the local build up of the ion concentration. 32 By tuning the pulse duration, deposition time, and the gap distance between the tip and the electrode, the diameter of the deposited nanospheres was varied from tens of nanometers to one micrometer. Bakhti and co-workers reported a technique to grow single gold filaments based on a bias-assisted electro-reduction of gold ions directly at the AFM tip apex.…”

Section: Tersmentioning

confidence: 99%