“…PS nanoparticles can be identified by means of the SERS spectrum while passing through a single nanopore, as shown in Fig. 7 B [ 98 ]. Fig.…”
Section: Mnp Detection By Raman Spectroscopymentioning
confidence: 99%
“…Furthermore, due to their excellent enhancement of resonance Raman scattering spectroscopy, many researchers have been interested in developing the plasmonic nanomaterials-based SERS sensing method. In particular, also successfully developed for MNP detection are the plasmonic nanostructure-based SERS technique [ 88 – 91 ] with supporting silver nanoparticles (AgNPs) [ 92 ], gold nanoparticle (AuNP) substrates [ 93 ], gold nanostars [ 94 ], commercialized Klarite substrates [ 95 ], AuNP-decorated sponges [ 96 ], silver-coated gold nanostars [ 97 ], a single gold nanopore fabricated at the tip of a glass nanopipette [ 98 ], SiO 2 self-assembly sputtered with Ag films [ 99 ], Ag nanowire arrays on regenerated cellulose (RC) films [ 100 ], and microfluidic chips [ 101 ].…”
Micro(nano)plastic (MNP) pollutants have not only impacted human health directly, but are also associated with numerous chemical contaminants that increase toxicity in the natural environment. Most recent research about increasing plastic pollutants in natural environments have focused on the toxic effects of MNPs in water, the atmosphere, and soil. The methodologies of MNP identification have been extensively developed for actual applications, but they still require further study, including on-site detection. This review article provides a comprehensive update on the facile detection of MNPs by Raman spectroscopy, which aims at early diagnosis of potential risks and human health impacts. In particular, Raman imaging and nanostructure-enhanced Raman scattering have emerged as effective analytical technologies for identifying MNPs in an environment. Here, the authors give an update on the latest advances in plasmonic nanostructured materials-assisted SERS substrates utilized for the detection of MNP particles present in environmental samples. Moreover, this work describes different plasmonic materials—including pure noble metal nanostructured materials and hybrid nanomaterials—that have been used to fabricate and develop SERS platforms to obtain the identifying MNP particles at low concentrations. Plasmonic nanostructure-enhanced materials consisting of pure noble metals and hybrid nanomaterials can significantly enhance the surface-enhanced Raman scattering (SERS) spectra signals of pollutant analytes due to their localized hot spots. This concise topical review also provides updates on recent developments and trends in MNP detection by means of SERS using a variety of unique materials, along with three-dimensional (3D) SERS substrates, nanopipettes, and microfluidic chips. A novel material-assisted spectral Raman technique and its effective application are also introduced for selective monitoring and trace detection of MNPs in indoor and outdoor environments.
Graphical abstract
“…PS nanoparticles can be identified by means of the SERS spectrum while passing through a single nanopore, as shown in Fig. 7 B [ 98 ]. Fig.…”
Section: Mnp Detection By Raman Spectroscopymentioning
confidence: 99%
“…Furthermore, due to their excellent enhancement of resonance Raman scattering spectroscopy, many researchers have been interested in developing the plasmonic nanomaterials-based SERS sensing method. In particular, also successfully developed for MNP detection are the plasmonic nanostructure-based SERS technique [ 88 – 91 ] with supporting silver nanoparticles (AgNPs) [ 92 ], gold nanoparticle (AuNP) substrates [ 93 ], gold nanostars [ 94 ], commercialized Klarite substrates [ 95 ], AuNP-decorated sponges [ 96 ], silver-coated gold nanostars [ 97 ], a single gold nanopore fabricated at the tip of a glass nanopipette [ 98 ], SiO 2 self-assembly sputtered with Ag films [ 99 ], Ag nanowire arrays on regenerated cellulose (RC) films [ 100 ], and microfluidic chips [ 101 ].…”
Micro(nano)plastic (MNP) pollutants have not only impacted human health directly, but are also associated with numerous chemical contaminants that increase toxicity in the natural environment. Most recent research about increasing plastic pollutants in natural environments have focused on the toxic effects of MNPs in water, the atmosphere, and soil. The methodologies of MNP identification have been extensively developed for actual applications, but they still require further study, including on-site detection. This review article provides a comprehensive update on the facile detection of MNPs by Raman spectroscopy, which aims at early diagnosis of potential risks and human health impacts. In particular, Raman imaging and nanostructure-enhanced Raman scattering have emerged as effective analytical technologies for identifying MNPs in an environment. Here, the authors give an update on the latest advances in plasmonic nanostructured materials-assisted SERS substrates utilized for the detection of MNP particles present in environmental samples. Moreover, this work describes different plasmonic materials—including pure noble metal nanostructured materials and hybrid nanomaterials—that have been used to fabricate and develop SERS platforms to obtain the identifying MNP particles at low concentrations. Plasmonic nanostructure-enhanced materials consisting of pure noble metals and hybrid nanomaterials can significantly enhance the surface-enhanced Raman scattering (SERS) spectra signals of pollutant analytes due to their localized hot spots. This concise topical review also provides updates on recent developments and trends in MNP detection by means of SERS using a variety of unique materials, along with three-dimensional (3D) SERS substrates, nanopipettes, and microfluidic chips. A novel material-assisted spectral Raman technique and its effective application are also introduced for selective monitoring and trace detection of MNPs in indoor and outdoor environments.
Graphical abstract
“…For nano-sized particles, other spectroscopic approaches, such as surface-enhanced Raman spectroscopy (SERS) and fluorescence have proven capabilities for identifying different particle sizes at very low concentrations [73,74], with promising results demonstrated particularly for SERS [73,75]. In addition, recent advances in nano-FTIR, IR-Enhanced Atomic Force Microscopy, Tip-Enhanced Raman Spectroscopy and Raman tweezers may complement SERS in the analysis of plastic particles as small as 20 nm [40,76,77].…”
Human exposure to nano- and microplastics (NMPs) has raised major societal concerns, yet no framework to assess the risks of NMPs for human health exists. A substantial proportion of plastic produced worldwide is not properly disposed and persists in the environment for decades while degrading. Plastic degradation generates a size continuum of fragments, including nano- and microplastic particles, with numerous associated environmental pollutants and plastic additives, and microbial communities colonising their surfaces. The ubiquitous presence of NMPs, their availability for uptake by organisms and their potential to act as vectors for toxicants and pathogens render risk assessment a priority on the political agenda at the global level. We provide a new, fully integrated risk assessment framework tailored to the specificities of NMPs, enabling an assessment of current and future human health risks from NMPs. The framework consists of four novel paradigms to the traditional risk assessment methodology. These paradigms deal with techniques in NMP analysis, gaps in empirical data, theoretical and modelling approaches and stakeholder engagement. Within the proposed framework, we propose how we can use research experiences gained so far to carry out the different steps of the assessment process, and we define priorities for further research.
“…First, gold is more suitable for conventional device fabrication technologies. 39 Second, gold is more readily and easily functionalized by thiol compounds so as to improve the interaction with the translocating molecule. 40 Third, gold is stable and can offer very reliable and consistent materials characteristics.…”
Deoxyribonucleic acid (DNA) sequencing has found its wide applications in medicine including treatment of diseases, diagnosis and genetics studies. Rapid and cost-effective DNA sequencing has been achieved by measuring the...
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