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Open research questions in Gold and Silver Nanoparticles Synthesis and Applications

118 gap statements mined from Gold and Silver Nanoparticles Synthesis and Applications papers in our 4.5M-paper local library, which holds 1,837 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • It notes that conventional immunoassays are not well suited for point-of-care testing or multiplexed analysis due to their reliance on complex instrumentation. The gap also includes the need for a platform that can detect multiple cancer biomarkers simultaneously with high sensitivity.

    Multiplexed Detection of Cancer Biomarker Using a Dual-Mode Colorimetric-SERS Lateral Flow Immunoassay Based on Elongated Rod Ag Nanoshell (ERNS) SERS Tags · 2026 · DOI

  • One challenge is the need to develop sensitive and selective methods for detecting metal ions in complex matrices. Another challenge is the potential for ionic interference, which can be mitigated using masking agents. The paper also identifies the challenge of achieving trace-level detection of target ions, which requires highly sensitive and reliable methods.

    A Review of Aggregation-Based Colorimetric and SERS Sensing of Metal Ions Utilizing Au/Ag Nanoparticles · 2026 · DOI

  • The complex matrix of chicken blood, which can interfere with SERS detection. The need to optimize SERS detection conditions to maximize SERS intensities. The requirement for a robust prediction model that can accurately capture the intrinsic nonlinear correlations in the complex chicken blood matrix.

    GA-SVR Optimized Surface-Enhanced Raman Spectroscopy for Rapid Detection of Ciprofloxacin Residues in Chicken Blood · 2026 · DOI

  • The lack of rapid detection methods for complex chicken blood matrices. The need for a method that can provide timely determination of the slaughter qualification of chickens. The requirement for a technique that enables sensitive, rapid detection with minimal sample pretreatment.

    GA-SVR Optimized Surface-Enhanced Raman Spectroscopy for Rapid Detection of Ciprofloxacin Residues in Chicken Blood · 2026 · DOI

  • The gap is that the nonlinear optical properties of composite materials containing metallic nanoparticles are not fully understood. The difference in the results of calculating the frequency characteristics of the absorption and scattering cross-sections for assemblies of prolate and oblate spheroids is not well established.

    Light absorption and scattering of an assembly of spheroidal metal nanoparticles · 2026 · DOI

  • The limited sensitivity of conventional monitoring techniques. The need to minimize fluorescence interference in SERS measurements. The challenge of achieving uniform SERS responses and reproducing the results.

    Ultra-Trace Monitoring of Methylene Blue Degradation via AgNW-Based SERS: Toward Sustainable Advanced Oxidation Water Treatment · 2025 · DOI

  • Achieving large-area, uniform, and controllable nanostructures remains challenging. The controllable fabrication of plasmonic substrates for metal-enhanced fluorescence and surface-enhanced Raman scattering is not well understood.

    Angle-Dependent Dip Coating Strategy for Silver Nanostructured Surface Fabrication with Enhanced Fluorescence and Surface-Enhanced Raman Scattering Properties · 2026 · DOI

  • However, the controllable synthesis of such nanocomposites and their related applications are still underexplored.

    Silver Mask-Mediated Synthesis and Plasmonic Nanoparticle Decoration of ZnO Nanosheaves · 2025 · DOI

  • While the optothermal printing technique has recently emerged as a promising technique for the direct and rapid printing of plasmonic nanoparticles onto transparent substrates at lower laser intensities, its potential to print the plasmonic nanoparticles to the core of the optical fiber platforms and utilize it for biological cell trapping as well as an analytical platform remains unexplored.

    Optically printed plasmonic fiber tip-assisted SERS-based chemical sensing and single biological cell studies · 2024 · DOI

  • The findings from this analysis suggest the potential for further research on the use of these conjugates in biomedical applications.

    Spectroscopic studies under properties of chlorpromazine conjugated to gold nanoparticles · 2024 · DOI

  • The chemical stability of SERS substrates in complex biological environments remains a challenge. The lack of a cost-effective and high-reliability platform for biomolecule detection.

    Deep-ultraviolet plasmonic molybdenum nanoholes for adenine detection via deep-learning-enhanced Raman scattering spectroscopy · 2026 · DOI

  • The lack of effective diagnostic and therapeutic options for kidney diseases. The limited understanding of the relationship between gold nanomaterial properties and their renal clearance and toxicity. The need for scalable and clinically translatable gold nanomaterials for kidney disease applications.

    Gold nanomaterials in the diagnosis and treatment of kidney diseases: from fundamental transport mechanisms to clinical translation prospects · 2026 · DOI

  • The lack of a versatile platform for designing high-performance plasmonic–semiconductor photocatalysts.

    Engineering the surface chemistry of silicon nanocrystals for efficient Ag-Si hybrid photocatalysts toward CO2 reduction · 2026 · DOI

  • Clinically relevant targets are often dilute, embedded in complex matrices, and unable to occupy hotspots reproducibly. Many SERS biosensors still face difficulty in clinical translation due to variability in patient samples, matrix composition, and instrument conditions. A clinically useful SERS biosensor must preserve analytical meaning across all sources of variation.

    AI/ML-Assisted SERS Biosensing for Biomolecular Detection: From Direct Spectral Response to Integrated Diagnostic Systems · 2026 · DOI

  • Variations in the local refractive index can detune the resonance from the excitation wavelength, leading to signal fluctuations and limited quantitative reliability in SERS. Prior SERS substrates relying on single-resonant plasmonic enhancement can be limited by these variations.

    Label-Free Quantification of Bilirubin Using a Refractive Index-Insensitive Nanolaminate SERS Substrate · 2026 · DOI

  • The top-down method is severely limited in its ability to regulate the AuNPs' surface and structure. The top-down method, however, is exceedingly uneconomical and difficult to achieve product criteria.

    Gold Nanoparticles in Biomedical Applications: Synthesis, Functionalization, and Recent Advances · 2025 · DOI

  • Accessing the poorly studied high–wave number [>2500 per centimeter (cm −1)] region provides much improved discriminatory capabilities, enabling us to generalize this approach to a range of volatile organic carbon (VOC) molecules including ethanol, methanol, and acetone.

    The optical nose: Monolayer sensitization of Au surfaces for plasmonic gas sensing · 2026 · DOI

  • Formulating surface modification techniques with enhanced anti-interference properties and environmental adaptation to augment the long-term stability and specificity of probes in intricate matrices such as whole blood and wastewater; Enhancing the utilization of chemometrics and artificial intelligence algorithms in spectral data processing to resolve non-linear signal responses and multiple interference…

    A Review of Aggregation-Based Colorimetric and SERS Sensing of Metal Ions Utilizing Au/Ag Nanoparticles · 2026 · DOI

  • The development of emerging, rapid, and low professionalism detection methods become the direction of the ABA detection field, - further evaluation of the application ability of the biosensor in a variety of plant…

    A SERS/LSPR Dual-Signal Aptamer Sensor for Abscisic Acid Detection Based on Unmodified Gold Nanoparticles · 2026 · DOI

  • Future AI-assisted SERS systems should be evaluated not only by model performance, but also by the function of the model, the main source of risk, and the validation strategy, - AI-guided optimization can help identify design regions where enhancement, uniformity, target access, and matrix resistance…

    AI/ML-Assisted SERS Biosensing for Biomolecular Detection: From Direct Spectral Response to Integrated Diagnostic Systems · 2026 · DOI

  • Further research is needed to explore the applications of the multi-resonant nanolaminate SERS substrate in different fields, - Investigation of the substrate's performance in various environments and with different analytes could provide valuable insights, - Development of new SERS-based biosensing platforms using the multi-resonant nanolaminate design could lead to improved quantitative…

    Label-Free Quantification of Bilirubin Using a Refractive Index-Insensitive Nanolaminate SERS Substrate · 2026 · DOI

  • Systematic elucidation of the underlying mechanisms by which key process parameters influence structural morphology and optical performance, - investigation of the effects of other process parameters on the morphology and optical properties of the silver…

    Angle-Dependent Dip Coating Strategy for Silver Nanostructured Surface Fabrication with Enhanced Fluorescence and Surface-Enhanced Raman Scattering Properties · 2026 · DOI

  • Standardizing the substrate drying process to ensure uniform SERS responses. Exploring the application of SERS-based detection platforms for other pollutants. Investigating the potential for bioaccumulation of methylene blue and its effects on environmental and food safety.

    Ultra-Trace Monitoring of Methylene Blue Degradation via AgNW-Based SERS: Toward Sustainable Advanced Oxidation Water Treatment · 2025 · DOI

  • Further optimization of the Mo nanoholes substrate fabrication process. Exploration of the application of the deep-learning-based spectral analysis approach to other biomolecules. Investigation of the use of the technique in different biological environments.

    Deep-ultraviolet plasmonic molybdenum nanoholes for adenine detection via deep-learning-enhanced Raman scattering spectroscopy · 2026 · DOI

  • Investigating the scalability and clinical translatability of gold nanomaterials for kidney disease applications. Exploring the use of gold nanomaterials for therapeutic applications in kidney disease. Developing novel gold nanomaterials with improved physicochemical properties for efficient renal clearance and targeting.

    Gold nanomaterials in the diagnosis and treatment of kidney diseases: from fundamental transport mechanisms to clinical translation prospects · 2026 · DOI

Most-cited papers in Gold and Silver Nanoparticles Synthesis and Applications

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Open questions raised by papers listed on this page include: (1) The lack of rapid detection methods for complex chicken blood matrices (“GA-SVR Optimized Surface-Enhanced Raman Spectroscopy for Rapid Detection of…”, 2026); (2) The gap is that the nonlinear optical properties of composite materials containing metallic nanoparticles are not fully understood (“Light absorption and scattering of an assembly of spheroidal metal nanoparticles”, 2026); (3) The controllable fabrication of plasmonic substrates for metal-enhanced fluorescence and surface-enhanced Raman scattering is not well understood (“Angle-Dependent Dip Coating Strategy for Silver Nanostructured Surface…”, 2026); (4) The lack of a cost-effective and high-reliability platform for biomolecule detection (“Deep-ultraviolet plasmonic molybdenum nanoholes for adenine detection via…”, 2026); (5) The lack of effective diagnostic and therapeutic options for kidney diseases (“Gold nanomaterials in the diagnosis and treatment of kidney diseases: from…”, 2026). 118 gap statements have been mined from Gold and Silver Nanoparticles Synthesis and Applications papers in our 4.5M-paper local library, which holds 1,837 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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