Near‐Infrared Photoluminescence from Small Copper, Silver, and Gold Nanoparticles

Andolina, Christopher M.; Crawford, Scott E.; Smith, Ashley M.; Johnston, Kathryn A.; Straney, Patrick J.; Marbella, Lauren E.; Tolman, Nathan; Hochuli, Taylor J.; Millstone, Jill E.

doi:10.1002/cnma.201700382

Cited by 13 publications

(10 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NIR PL was observed for each of the monometallic particle types, with element-specific differences in emission energy and quantum yield (Figure ). Interestingly, an excitation transition at ∼360 nm was observed for each metal core, consistent with ligand-to-metal charge transfer states that have been reported for luminescent coinage metal complexes , and emissive Au clusters, suggesting a surface chemistry-mediated mechanism for each coinage metal NP . Importantly, the CuNPs and AgNPs exhibit quantum yields that are on the same order of magnitude as those from AuNPs, illustrating their potential as complements to AuNPs in NIR-driven applications .…”

Section: Metallic Surface Propertiessupporting

confidence: 80%

See 1 more Smart Citation

Surface Chemistry-Mediated Near-Infrared Emission of Small Coinage Metal Nanoparticles

2019

Self Cite

View full text Add to dashboard Cite

Conspectus From size-dependent luminescence to localized surface plasmon resonances, the optical properties that emerge from common materials with nanoscale dimensions have been revolutionary. As nanomaterials get smaller, they approach molecular electronic structures, and this transition from bulk to molecular electronic properties is a subject of far-reaching impact. One class of nanomaterials that exhibit particularly interesting optoelectronic features at this size transition are coinage metal (i.e., group 11 elements copper, silver, and gold) nanoparticles with core diameters between approximately 1 to 3 nm (∼25–200 atoms). Coinage metal nanoparticles can exhibit red or near-infrared photoluminescence features that are not seen in either their molecular or larger nanoscale counterparts. This emission has been exploited both as a probe of electronic behavior at the nanoscale as well as in critical applications such as biological imaging and chemical sensing. Interestingly, it has been demonstrated that their photoluminescence figures of merit such as emission quantum yield, energy, and lifetime are largely independent of particle diameter. Instead, emission from particles at this size range depends heavily on the particle surface chemistry, which includes both its metallic composition and the capping ligand architecture. The strong influence of surface chemistry on these emergent optoelectronic phenomena has powerful implications for both the study and use of these particles, primarily due to the theoretically limitless possible surface ligand architectures and metallic compositions. In this Account, we highlight recent work that studies and uses surface chemistry-mediated photoluminescence from coinage metal nanoparticles. Specifically, we emphasize the distinct, as well as synergistic, roles of the nanoparticle capping ligand and the nanoparticle core for controlling and/or enhancing their near-infrared photoluminescence. We then discuss the implications of surface chemistry-mediated photoluminescence as it relates to downstream applications such as energy transfer, sensing, and biological imaging. We conclude by discussing current challenges that remain in the field, including opportunities to develop new particle synthetic routes, analytical tools, and physical frameworks with which to understand small nanoparticle emission. Taken together, we anticipate that these materials will be foundational both in understanding the unique transition from molecular to bulk electronic structures and in the development of nanomaterials that leverage this transition.

show abstract

Section: Metallic Surface Propertiessupporting

confidence: 80%

Section: Metallic Surface Propertiesmentioning

confidence: 99%

Surface Chemistry-Mediated Near-Infrared Emission of Small Coinage Metal Nanoparticles

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Photoluminescence spectra of Cu NPs bio-synthesized using Gum Kondagogu extract showed an emission peak at 430 nm when illuminated at 325 nm [143]. Cu NPs PL revealed an emission band in the near-infrared region at 816 nm with photoexcitation with UV-vis light at 360 nm [144]. The collected data revealed that the PL emission of Cu NPs not only depends on the excitation wavelength; but also the adsorbed biomolecules on the surface of synthesized Cu NPs, particle size, shape, and the ratio of reducing and capping agent which can enhance the emission peak and also, irradiation time as Gui et al [145] reported.…”

Section: Photoluminescence (Pl) Of Copper Nanoparticlesmentioning

confidence: 98%

Biogenic copper nanoparticles and their applications: A review

Al-Hakkani

2020

SN Appl. Sci.

139

View full text Add to dashboard Cite

The objective of the present work is the introduction of a quick and simple literature survey about the green bio-synthesized of copper nanoparticles. The survey revealed that the eco-friendly preparation methods using different plant species, properties and potential applications as alternative promising for silver and gold nanoparticles. The review enumerates the classification of nanomaterials in general, green biosynthesis of nanoparticles using plant extracts and its advantages over using bacteria and fungi. The manuscript gives more details about the specific properties for copper nanoparticles as optical properties of copper nanoparticles especially surface plasmon resonance in the visible range, photoluminescence, and bandgap energy. The current review spotlights and focuses on antimicrobial and anticancer activities for copper nanoparticles against several and various types of gram-negative, gram-positive bacteria, fungi, and human cell cancers. Moreover, a new promising activity as adsorptive efficiency of copper nanoparticles for wastewater treatment was revealed. Keywords Nanoparticles • Biosynthesis • Copper • Anti-cancer • Anti-microbial • Adsorption Abbreviations E g Energy band gap B. subtilis Bacillus subtilis bacteria C. albicans Candida albicans fungi Caco-2 Human colorectal adenocarcinoma cells Cu NPs Copper nanoparticles E. coli Escherichia coli bacteria FT-IR Fourier-transform infrared HepG2 Human hepatocellular carcinoma cells HPLC High performance liquid chromatography IC 50

show abstract

“…In particular, metal NPs encapsulated within conductive MOFs create Schottky junctions at their interface, which act as active sites for analyte adsorption and charge transfer. 64 Similarly, metal nanoclusters composed of coinage metals (Cu, Ag, and Au) exhibit surface chemistry-dependent Please do not adjust margins photoluminescence 212,213 and can be linked together by rigid organic molecules to form MOFs with unique optical properties 214,215 Emission from powders of these materials has been used for gas sensing applications, 216,217 indicating that these MOFs would likely have utility as thin film sensors. In addition to improving sensor performance, integrating MOFs with other materials may improve material stability, an important consideration for sensor deployment.…”

Section: Composite Mof Materialsmentioning

confidence: 99%