A microwave-facilitated rapid synthesis of gold nanoclusters with tunable optical properties for sensing ions and fluorescent ink

Zhang, Jia; Yue, Yuan; Liang, Gaolin; Arshad, Muhammad Nadeem; Albar, Hassan Abdulkader; Sobahi, Tariq R.; Yu, Shu‐Hong

doi:10.1039/c5cc03086b

Cited by 58 publications

(29 citation statements)

References 21 publications

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“…The fluorescence emission was tunable based on the reaction time in microwave-based synthesis; emitting blue-shifts with increase in reaction time. 278 The non-fluorescent nano-barcodes based on the phase change of organic-solid nanoparticles have been used for drug anti-counterfeiting by mixing the nanoparticles with the drug powder as can be seen in Fig. 23c.…”

Section: Securitymentioning

confidence: 99%

Versatile design and synthesis of nano-barcodes

et al. 2017

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Encoded nano-structures/particles have been used for barcoding and are in great demand for the simultaneous analysis of multiple targets. Due to their nanoscale dimension(s), nano-barcodes have been implemented favourably for bioimaging, in addition to their security and multiplex bioassay application. In designing nano-barcodes for a specific application, encoding techniques, synthesis strategies, and decoding techniques need to be considered. The encoding techniques to generate unique multiple codes for nano-barcodes are based on certain encoding elements including optical (fluorescent and non-fluorescent), graphical, magnetic, and phase change properties of nanoparticles or their different shapes and sizes. These encoding elements can generally be embedded inside, decorated on the surface of nanostructures or self-assembled to prepare the nano-barcodes. The decoding techniques for each encoding technique are different and need to be suitable for the desired applications. This review will provide a thorough discussion on designing nano-barcodes, focusing on the encoding techniques, synthesis methods, and decoding for applications including bio-detection, imaging, and anti-counterfeiting. Additionally, associated challenges in the field and potential solutions will also be discussed. We believe that a comprehensive understanding on this topic could significantly contribute towards the advancement of nano-barcodes for a broad spectrum of applications.

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Section: Securitymentioning

confidence: 99%

Versatile design and synthesis of nano-barcodes

et al. 2017

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“…[39,40] M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 7 Different models and theoretical approaches aimed to clarify the origin and characteristics of the luminescence of GNCs are discussed in this section.…”

Section: Optical Properties Of Luminescent Gncsmentioning

confidence: 99%

“…On the other hand, as it will be discussed in section 2.3 the properties of the stabilizing ligands also play an important and is some cases dominant role in determining the luminescence properties of GNCs. [34,[38][39][40] Because of this combined effect of geometric and chemical features, optimization and control of the synthetic process is crucial to obtain GNCs with tailored luminescence properties. On the other hand, the synthetic access to well defined and monodispersed structures is fundamental for understanding the origin of GNCs emission.…”

Section: Synthesis and Properties Of Luminescent Gncsmentioning

confidence: 99%

Luminescent gold nanoclusters as biocompatible probes for optical imaging and theranostics

et al. 2016

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“…[6] The selectiono fm aterials for developmento fs ecurity codes follows as tringentc riterion that these should be stable for long time, easy to be synthesised with high yields at economical cost, eco-friendly,d ifficult to counterfeite tc. [6][7][8][9][10] In the last decade, various kinds of luminescentm aterials like conventionalo rganic dyes, lanthanide based luminescent nanomaterials, [6][7][8][11][12][13][14][15] semiconductor quantum dots, [16][17][18][19][20][21] carbonb ased quantum dots, [22][23][24][25] plasmonic nanomaterials, [26][27][28][29][30] metal-organic-frameworks (MOFs) [31][32][33][34] etc. have been explored for security ink fabrication to serve the purposeo f anti-counterfeiting applications.A ll the abovem entioned types have some pros and cons associated with them.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Synthesise a Dual‐Mode Luminescent Composite Pigment for Uncloneable High‐Security Codes to Combat Counterfeiting

Kanika

Kumar

Singh

et al. 2017

Chemistry A European J

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A strategy is demonstrated to protect valuable items, such as currency, pharmaceuticals, important documents, etc. against counterfeiting, by marking them with luminescent security codes. These luminescent security codes were printed by employing luminescent ink formulated from a cost effective dual-mode luminescent composite pigment of Gd Yb Er O and Zn Mn S phosphors using commercially available PVC Gold medium. In the composite, Gd Yb Er O and Zn Mn S account for upconversion and downconversion processes, respectively. The synthesis procedure of the composite involves the admixing of Gd Yb Er O nanorods and Zn Mn S phosphor, synthesised by hydrothermal and facile solid-state reaction methods, respectively. The structural, morphological, microstructural, and photoluminescent features of Gd Yb Er O nanorods, Zn Mn S phosphor and composite were characterised by using XRD, SEM, TEM, and photoluminescence (PL) techniques, respectively. The distribution of PL intensity of the printed pattern was examined by using confocal PL mapping microscopy. The obtained results reveal that security codes printed using ink formulated from this bi-luminescent composite pigment provide dual-stage security against counterfeiting.

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A microwave-facilitated rapid synthesis of gold nanoclusters with tunable optical properties for sensing ions and fluorescent ink

Abstract: Luminescent glutathione-capped gold nanoclusters (GS-AuNCs) with tunable emissions have been efficiently synthesized by a solution-based microwave method.

Cited by 58 publications

References 21 publications

Versatile design and synthesis of nano-barcodes

Versatile design and synthesis of nano-barcodes

Luminescent gold nanoclusters as biocompatible probes for optical imaging and theranostics

A Novel Approach to Synthesise a Dual‐Mode Luminescent Composite Pigment for Uncloneable High‐Security Codes to Combat Counterfeiting

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