Novel paper-based sensing platform using photoluminescent gold nanoclusters for easy, sensitive and selective naked-eye detection of Cu2+

Photoluminescent Histidine-Stabilized Gold Nanoclusters as Efficient Sensors for Fast and Easy Visual Detection of Fe Ions in Water Using Paper-Based Portable Platform

“…Therefore, the development of cheaper, easier, faster and portable sensing methods is highly desired. Lately, filter paper has been extremely exploited in the development of cheap sensing devices due to its excellent porosity, versatility, permeability and eco-friendly properties [ 33 , 34 , 35 ]. Therefore, we combined the appealing properties of filter paper with the excellent sensing capacity of His-AuNCs in order to fabricate a cheap and accessible portable device for the rapid, qualitative and quantitative detection of Fe 2+ from water.…”

“…Recently, paper is considered to be a high-profile candidate for the fabrication of novel lab-on-a-chip sensing platforms owing to its high efficiency-price ratio, portability, flexibility and eco-friendly properties. Specifically, the cellulose fiber component can be easily functionalized or impregnated with colloidal samples, thus resulting in attractive properties such as great hydrophilicity, permeability and reactivity [ 33 , 34 ]. Therefore, filter paper can be promising for various detection applications in environmental monitoring or food quality control [ 35 ].…”

Gold Nanoclusters as a Fluorescent Probe for the Sensitive Determination of Morin and Sensing of Temperature

“…Many methods have been used to synthesize Au NCs such as etching method, [39] reversible phase transfer method, [40] microwave‐assisted method, [41] sonochemical method, [42] photoreduction, [43] dynamic control method, [44] electrochemical method, [45] template‐assisted method [46] . Meanwhile, Ag NCs have been used to determine ascorbic acid, [47] cysteine, [48] ciprofloxacin, [49] tobramycin, [50] Cu 2+ , [51] glutathione, [52] Hg 2+ , [53] Fe 3+ , [54] trinitrotoluene, [55] molybdenum, [56] vitamin B 12 , [57] 1‐hydroxypyrene [58]…”

Intrinsic Photoluminescence of Solid-State Gold Nanoclusters: Towards Fluorescence Lifetime Imaging of Tissue-Like Phantoms Under Two-Photon Near-Infrared Excitation

“…They are composed of a few and up to 200 atoms, having a size comparable to the Fermi wavelength, and are protected by an organic molecular ligand enriching them with molecular-like properties such as large Stoke shift and tunable intrinsic photoluminescence (PL) ( Akyüz et al, 2020 ), similar to upconversion nanocrystals ( Wang et al, 2021a ; Wang et al, 2021b ). Owing to the aforementioned characteristics, NCs show potential in various applications like cell and tissue imaging ( Liu et al, 2011 ; Chen et al, 2016 ), biolabeling ( Xu et al, 2020 ), catalysis ( Li and Jin, 2013 ), molecular identification ( Zhang et al, 2018 ), ion detection ( Ding et al, 2014 ; Hada et al, 2021c ), etc. Among the most common metal NCs (gold, silver, copper), gold nanoclusters (AuNCs) present noteworthy advantages in terms of biocompatibility and photostability ( Zuber et al, 2019 ).…”

“…AuNCs can be synthesized using a wide range of capping agents such as polymers ( Tsunoyama et al, 2005 ), amino acids ( Liu et al, 2017 ), peptides ( Fabris et al, 2006 ), proteins ( Xie et al, 2009 ; Hada et al, 2021c ), etc. Amongst, a very common and easy to obtain protein, bovine serum albumin (BSA), is extremely used in the synthesis of AuNCs due to its appealing properties such as small dimensions, stability and biocompatibility ( Porret et al, 2020 ).…”