Light trapping induced flexible wrinkled nanocone SERS substrate for highly sensitive explosive detection

Towards practical and sustainable SERS: a review of recent developments in the construction of multifunctional enhancing substrates

“…The images in the "Flexible" panel were reproduced with permission from ref. 26, copyright 2020 Elsevier Ltd, ref. 68, copyright 2016 American Chemical Society and ref.…”

“…A common approach to regulate the morphology of the nanostructures produced from PVD to enhance their plasmonic performance is to use solid substrates which carry tailored surface morphologies to template the deposition process. 26,[104][105][106][107] For example, Li, et al reported the synthesis of flexible and transparent polyethylene terephthalate (PET) SERS stamps with crossing nanoporous Au structures on their surfaces for detection of thiram and 4-aminothiophenol on fruit surfaces, as illustrated in Figure 6A. 108 To create crossing nanopatterns on the surface of PET stamps, the surface of the PET were first covered with a 500 nm thick layer of SiO 2 .…”

“…120 It is worth noting that quite often plasmonic colloidal nanoparticles are protected by charged capping ligands, which provide interparticle electrostatic repulsion that prevents the formation of tightly packed plasmonic arrays. 26 However, this issue can be overcome through the addition of small amounts of chemical compounds to screen or remove the electrostatic charge on the surface of the nanoparticles. 26,120 Importantly, the nature of this process means that the self-assembly approach can be generally applied to produce densely packed 2-dimensional arrays from various types of plasmonic nanoparticles despite their morphology and surface chemistry which can then be conveniently transferred onto the surface of flexible substrates.…”

“…26 However, this issue can be overcome through the addition of small amounts of chemical compounds to screen or remove the electrostatic charge on the surface of the nanoparticles. 26,120 Importantly, the nature of this process means that the self-assembly approach can be generally applied to produce densely packed 2-dimensional arrays from various types of plasmonic nanoparticles despite their morphology and surface chemistry which can then be conveniently transferred onto the surface of flexible substrates. 100,114,121 Moreover, the fluid phases can act as the media to introduce polymeric materials which allows the soft liquid-based nanoparticle arrays to be transformed into flexible enhancing substrates for SERS through in-situ film formation.…”

An Overview of Anodic Oxides Derived Advanced Nanocomposites Substrate for Surface Enhance Raman Spectroscopy

“…To prepare that kind of SERS substrate, many approaches are taken under consideration, including the use of polymer nanofabric [35,36], cellulose [37,38], or flexible piezoelectric-modulated layer [39] decorated by silver or gold nanoparticles or nanowires. Few of these substrates can find its application in food industry, especially for pesticide detection [37,38,40], and others in explosive materials detection [41]. Despite many unquestionable advantages, such as high sensitivity, that kind of substrates can be temperature and humidity sensitive as well as still has short lifetime.…”