Nanomaterials based optical and electrochemical sensing of histamine: Progress and perspectives.

Electrocatalytic properties of CoS2/MoS2/rGO as a non-noble dual metal electrocatalyst: The investigation of hydrogen evolution and methanol oxidation

The ability to enhance the heat resistance of noble metals is vital to many industrial and academic applications. Because of its exceptional thermal properties, graphene was used to enhance the thermal stability of noble metals. Monolayer graphene-covered noble metal triangular nanoarrays (TNAs) showed excellent heat resistance, which could maintain their original triangular nanoarrays at high temperatures, whereas bare noble metal TNAs all agglomerate into spherical nanoparticles. On the basis of this mechanism, we obtained a universal recyclable surface-enhanced Raman scattering (SERS) substrate; after 16 cycles, the SERS substrate still worked well. The improvement of the heat resistance of noble metals by graphene has a great significance to the working reliability and service life of electronic devices and the single-use problem of traditional SERS substrates.

Improved Thermal Stability of Graphene-Veiled Noble Metal Nanoarrays as Recyclable SERS Substrates

In recent times, wearable electronics, real-time sensing devices and point-of-care device applications have seen a surge in demand. This demand inherently calls for a more economic and reliable method of mass production. One such robust technique is screen printing that offers advantages in terms of being versatile, economical and easy to use. This technique has been proclaimed to be the best amongst the other additive manufacturing techniques by many research groups. This can be solely attributed to its simple equipment design, requiring a paste for printing purpose, a meshwork for housing the design and a squeegee to carry out printing through an up-and-down motion. This subsequently calls for optimising the parameters such as ink rheology, pore size of the mesh, proper choice of mesh design and motion of the squeeze in order to fabricate electrodes for desired purpose. Due to this technique’s immense potential to open up broad inroads in the domain of flexible electronics, whose concept has radically redefined the perception towards the field of electronics, a review article encompassing an elaborate description on the science and other quintessential parameters involved in this mass printing technique would prove to be extremely useful. In this purview, the review article is compartmentalised into sections encompassing discussion on the manufacturing of different kinds of inks for screen printing applications, substrates used, electrode design and pre-treatment procedures.

Fabrication of screen-printed electrodes: opportunities and challenges

Hierarchical micro/nanostructured TiO 2 /Ag substrates based on femtosecond laser structuring: A facile route for enhanced SERS performance and location predictability

In this paper, rutile and anatase TiO2/Ag nanocomposites were prepared by a facile and green photochemical method The as-prepared samples were investigated by using various spectroscopic and microscopic techniques in detail Trace detection of rhodamine 6G (R6G) and crystal violet (CV) was studied based on the nanocomposites Compared to the anatase TiO2/Ag nanocomposite, the rutile TiO2/Ag nanocomposites (Sr3) exhibited the best SERS performance for rhodamine 6G (R6G) Then, the optimized SERS-active substrates (Sr3) were employed to study its recycling properties by degrading R6G and CV in situ The substrates were able to self-clean The possible mechanism of the good SERS and photocatalytic performance of the TiO2/Ag nanocomposite (Sr3) was discussed This work is of importance in theoretical research and practical application based on the SERS effect of nanocomposites

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Synthesis, characterization and application of TiO2/Ag recyclable SERS substrates

Controlled synthesis of biocompatible rGO@CD@Au nanocomposites for trace detection for doxorubicin by Raman imaging spectroscopy

Cyclodextrin (β-CD)-functionalized reduced graphene oxide was successfully synthesized by a simple hydrothermal method, followed by conjugating with polyethylene glycol (PEG) and folic acid (FA). Microscopic and spectroscopic techniques were used to characterize the nanocomposites. Photothermal experiments showed that β-CD-functionalized reduced graphene oxide exhibited higher photothermal conversion efficiency in the near infrared region than reduced graphene oxide functionalized with other molecules under the same conditions. Cytotoxicity experiments indicated that rGO@CD@PEG@FA possessed good biocompatibility even at high concentration. When doxorubicin (DOX) was loaded on the rGO@CD@PEG@FA nanocomposite, it showed the stimulative effect of heat, pH response, and sustained drug release. Cytotoxicity experiments also confirmed the targeted effect and high efficiency of the combined therapy. The findings of the present study provide an ideal drug delivery system for malignant cancer therapy due to the advanced synergistic chemo-photothermal targeted therapy and good drug release properties.

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Ting Li

Papers

Synthesis, characterization and application of TiO2/Ag recyclable SERS substrates

Controlled synthesis of biocompatible rGO@CD@Au nanocomposites for trace detection for doxorubicin by Raman imaging spectroscopy

Synthesis of novel cyclodextrin-modified reduced graphene oxide composites by a simple hydrothermal method

Synthesis of uniform Ag nanosponges and its SERS application.