Controlled Design and Fabrication of SERS–SEF Multifunctional Nanoparticles for Nanoprobe Applications: Morphology-Dependent SERS Phenomena

Chang, Sehoon; Eichmann, Shannon L.; Huang, Ting-Yun; Yun, Wonjin; Wang, Wei

doi:10.1021/acs.jpcc.7b00688

Cited by 28 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, this work also considers the effect of different ions in the fluids, which the specific motivation stems from recent efforts to deploy nanomaterials for subsurface oil reservoir applications. − To the best of our knowledge, this is the first study showing the interaction of nanomaterials on different calcite surface defects, mediated by specific ions.…”

Section: Introductionmentioning

confidence: 99%

Specific Ion Effects at Calcite Surface Defects Impact Nanomaterial Adhesion

2020

Self Cite

View full text Add to dashboard Cite

Motivated by applications in subsurface hydrocarbon reservoirs such as colloidal instability and nanomaterial adhesion to mineral surfaces, we report atomistic molecular dynamics simulations to study the adhesion of carboxylate functionalized atomic force microscopy (AFM) tips (as surrogates of nanomaterials) on calcite surface line and point defects in deionized water, seawater, and brine. The line defects include acute and obtuse steps, and the point defects include Ca2+ and CO3 2– vacancies. The accumulations of specific ions on both functionalized AFM tips and calcite surface defects result in reduced adhesion. The specific ions in fluids played the dominant roles to modulate adhesion, yet the surface defects also had distinct characteristics. We believe the molecular insights put forward in this work may have important implications for stabilizing nanomaterials in harsh subsurface oil and gas reservoirs. In addition, the differential affinities of the calcite surface defects with the presence of specific ions observed in this work may further the understanding of the wettability alteration mechanism of calcium carbonates in high salinity geologic settings. To the best of our knowledge, this is the first study showing the interaction of nanomaterials on different calcite surface defects, mediated by specific ions.

show abstract

Section: Introductionmentioning

confidence: 99%

Specific Ion Effects at Calcite Surface Defects Impact Nanomaterial Adhesion

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The unique properties of nanomaterials have the potential to achieve much higher performance in the above mentioned applications. For example, the ultra-sensitive optical properties 12,13 (e.g. persistent luminescence and surface-enhanced Raman scattering) may be used in reservoir interwell tracers for improved waterflood recovery optimization 14–16 .…”

Section: Introductionmentioning

confidence: 99%

Understanding Calcium-Mediated Adhesion of Nanomaterials in Reservoir Fluids by Insights from Molecular Dynamics Simulations

Chen

Eichmann

Burnham

2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

Interest in nanomaterials for subsurface applications has grown markedly due to their successful application in a variety of disciplines, such as biotechnology and medicine. Nevertheless, nanotechnology application in the petroleum industry presents greater challenges to implementation because of the harsh conditions (i.e. high temperature, high pressure, and high salinity) that exist in the subsurface that far exceed those present in biological applications. The most common subsurface nanomaterial failures include colloidal instability (aggregation) and sticking to mineral surfaces (irreversible retention). We previously reported an atomic force microscopy (AFM) study on the calcium-mediated adhesion of nanomaterials in reservoir fluids (S. L. Eichmann and N. A. Burnham, Sci. Rep . 7, 11613, 2017), where we discovered that the functionalized and bare AFM tips showed mitigated adhesion forces in calcium ion rich fluids. Herein, molecular dynamics reveal the molecular-level details in the AFM experiments. Special attention was given to the carboxylate-functionalized AFM tips because of their prominent ion-specific effects. The simulation results unambiguously demonstrated that in calcium ion rich fluids, the strong carboxylate-calcium ion complexes prevented direct carboxylate-calcite interactions, thus lowering the AFM adhesion forces. We performed the force measurement simulations on five representative calcite crystallographic surfaces and observed that the adhesion forces were about two to three fold higher in the calcium ion deficient fluids compared to the calcium ion rich fluids for all calcite surfaces. Moreover, in calcium ion deficient fluids, the adhesion forces were significantly stronger on the calcite surfaces with higher calcium ion exposures. This indicated that the interactions between the functionalized AFM tips and the calcite surfaces were mainly through carboxylate interactions with the calcium ions on calcite surfaces. Finally, when analyzing the order parameters of the tethered functional groups, we observed significantly different behavior of the alkanethiols depending on the absence or presence of calcium ions. These observations agreed well with AFM experiments and provided new insights for the competing carboxylate/calcite/calcium ion interactions.

show abstract

“…The maximal enhancement factor of Raman and fluorescence was 10 6 and 9-fold, respectively. In Change et al’s study [14], silver nanoparticles demonstrate both SERS and SEF properties. They have found that metallic particles’ aggregation status together with the interval between metal structure and emitters strongly influence the enhancement ratio.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Fabrication of Nanostructure on Bio-Metallic Substrate for Surface Enhanced Raman and Fluorescence Scattering

Zhang

Jiao

2019

Nanomaterials

View full text Add to dashboard Cite

The integration of surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF) has attracted increasing interest and is highly probable to improve the sensitivity and reproducibility of spectroscopic investigations in biomedical fields. In this work, dual-mode SERS and SEF hierarchical structures have been developed on a single bio-metallic substrate. The hierarchical structure was composed of micro-grooves, nano-particles, and nano-ripples. The crystal violet was selected as reporter molecule and both the intensity of Raman and fluorescence signals were enhanced because of the dual-mode SERS−SEF phenomena with enhancement factors (EFs) of 7.85 × 105 and 14.32, respectively. The Raman and fluorescence signals also exhibited good uniformity with the relative standard deviation value of 2.46% and 5.15%, respectively. Moreover, the substrate exhibited high sensitivity with the limits of detection (LOD) as low as 1 × 10−11 mol/L using Raman spectroscopy and 1 × 10−10 mol/L by fluorescence spectroscopy. The combined effect of surface plasmon resonance and “hot spots” induced by the hierarchical laser induced periodical surface structures (LIPSS) was mainly contributed to the enhancement of Raman and fluorescence signal. We propose that the integration of SERS and SEF in a single bio-metallic substrate is promising to improve the sensitivity and reproducibility of detection in biomedical investigations.

show abstract

Controlled Design and Fabrication of SERS–SEF Multifunctional Nanoparticles for Nanoprobe Applications: Morphology-Dependent SERS Phenomena

Cited by 28 publications

References 38 publications

Specific Ion Effects at Calcite Surface Defects Impact Nanomaterial Adhesion

Specific Ion Effects at Calcite Surface Defects Impact Nanomaterial Adhesion

Understanding Calcium-Mediated Adhesion of Nanomaterials in Reservoir Fluids by Insights from Molecular Dynamics Simulations

Large-Scale Fabrication of Nanostructure on Bio-Metallic Substrate for Surface Enhanced Raman and Fluorescence Scattering

Contact Info

Product

Resources

About