Nanostructures of Cysteine-Coated CdS Nanoparticles Produced with “Two-Particle” Lithography

Lewandowski, Brian R.; Kelley, Algernon T.; Singleton, Robert; Li, Jie Ren; Lowry, Mark; Warner, Isiah M.; Garno, Jayne C.

doi:10.1021/jp808056x

Cited by 26 publications

(23 citation statements)

References 90 publications

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“…51 Recent studies on functionalization of nanoparticles with cysteine have shown its interaction with different nanoparticles. 49,[52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] Gawande et al, have successfully functionalized ferrite nanoparticles with cysteine and studied their application in multi-component reactions. 67 In their study, cysteine functionalized ferrite nanoparticles are used as a catalyst for the synthesis of derivatives of b-amino carbonyl compounds and hydroquinoline; and these nanoparticles are found to be highly reusable even after 9 cycles of reactions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and antimicrobial property of Fe3O4-Cys-HNQ nanocomplex, with l-cysteine molecule as a linker

Sangeetha

Philip

2013

RSC Adv.

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Lawsone, (2-hydroxy-1,4-naphthoquinone or HNQ), is known for its antimicrobial activity, corrosion inhibition and metal chelation properties. We describe here a simple methodology to functionalize Fe 3 O 4 nanoparticles with lawsone to produce Fe 3 O 4 -Cysteine-HNQ nanocomplex, using cysteine as a linker. The characterization of the nanocomplex is done using Fourier Transform Infrared (FTIR) spectroscopy, Thermogravimetric Analysis (TGA), Dynamic Light Scattering size measurement, zeta potential and contact angle measurement. The zeta potential of uncoated nanoparticles and Fe 3 O 4 -Cysteine-HNQ nanocomplex is found to be +48 mV and 238 mV respectively. The reversal of surface charge from positive to negative corroborates the presence of lawsone monolayer at particle interface. Further, TGA result shows a weight loss of 32% for these nanocomplexes due to the decomposition of lawsone and cysteine present on the nanoparticles. The FTIR spectrum of the nanocomplex exhibits CLC and CLO stretching bands of lawsone, with a slight shift in their position, which confirms the interaction of lawsone with the cysteine coated nanoparticles. Fe 3 O 4 -Cysteine-HNQ nanocomplexes exhibit interesting properties such as increased wettability (contact angle y20u) on stainless steel substrate and antimicrobial activity against Staphylococcus aureus, with a minimum inhibitory concentration of 700 mg mL 21 . These results show that lawsone functionalized magnetite nanoparticles can be used as response stimulus antimicrobial agents.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and antimicrobial property of Fe3O4-Cys-HNQ nanocomplex, with l-cysteine molecule as a linker

Sangeetha

Philip

2013

RSC Adv.

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“…The shapes and surface density of gold nanoparticles and gold nanorods can be clearly resolved with SEM along the surface features of microlines. Dip-pen nanolithography (DPN) has been applied for direct surface patterning with nanoparticles of gold [39,53], iron oxide [38], cobalt [54], CoPt [55], CoFe 2 O 4 [55], CdS [50], BaFe [56], and metal-organic nanocrystals [57]. The processes for patterning and imaging nanopatterns prepared with DPN were accomplished ex situ.…”

Section: Spm-based Lithography With Nanoparticlesmentioning

confidence: 99%

“…The lattice parameters of the crystalline surface arrangement are depicted in figures 11b and 11c. An approach for "two-particle" lithography was reported by Lewandowski et al in which particles with different sizes and composition were mixed together to generate nanopatterns [50]. Two particle lithography was used to pattern cysteine-coated CdS nanoparticles (2 nm) on muscovite mica by evaporating a mixture of small CdS nanoparticles with silica spheres (500 nm).…”

Section: Arranging Nanoparticles On Surfaces Using Colloidal Lithographymentioning

confidence: 99%

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Approaches for Sample Characterization and Lithography with Nanoparticles using Modes of Scanning Probe Microscopy

Garno¹,

Jegede²,

McKee³

et al. 2019

Madridge J Anal Sci Instrum

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Measurement and imaging modes of scanning probe microscopy (SPM) have been routinely applied for characterizing systems of nanoparticles; however the evolution of fabrication methods to prepare arrangements of nanoparticles remains a challenge. Reproducible fabrication of surface structures which integrate nanoparticles within ultra-small patterns will require innovative approaches to achieve high throughput and precision. Strategies for nanoscale lithography have been introduced for preparing defined arrangements of nanoparticles on surfaces based on physical or chemical interactions. For example, physisorption was employed for attaching nanoparticles based on colloidal lithography and site-directed assembly. Microfabricated atomic force microscope (AFM) tips with capillary channels have been used to pattern nanoparticles through electrostatic interactions. Specific chemical interactions can be designed for patterning nanoparticles with dip-pen nanolithography and SPM-based fabrication. Studies with nanoparticles are reviewed, which have applied either in situ and ex situ approaches for imaging and measurements using modes of SPM. The imaging principle for contact and tapping modes are described with example studies of nanoparticle patterns. The SPM modes for measuring physical properties (e.g. magnetism, softness, conductance) using force modulation microscopy (FMM), magnetic force microscopy (MFM), magnetic sample modulation (MSM), and conductive probe AFM are described for selected studies of lithography with nanoparticles. Strategies for patterning nanoparticles using lithography modes of nanoshaving, dip-pen nanolithography, and tip-induced oxidation have been reported for a range of nanoparticle systems. Applications for nanotechnology will require the integration of nanoparticles within engineered surface architectures. Stable, organized arrangements of nanoparticles with robust chemical/physical attachment to surfaces will be needed for applications, to fully gain advantages of the characteristic quantum properties of nanoparticles.

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“…Previously, we introduced several particle lithography-based protocols for patterning organosilanes using steps of vapour deposition, immersion or contact printing [51,52]. The surface selectivity of organosilane nanopatterns prepared with particle lithography approaches can be further applied to define the placement of other molecules and nanoparticles [53,54]. Particle lithography offers advantages for high-throughput patterning and enables control of the surface coverage, geometry and lateral dimensions of nanopatterns with relatively inexpensive reagents.…”

Section: Introductionmentioning

confidence: 99%

Spatially selective surface platforms for binding fibrinogen prepared by particle lithography with organosilanes

2013

Self Cite

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One contribution of 10 to a Theme Issue 'Molecular-, nano-and micro-devices for real-time in vivo sensing'. We introduce an approach based on particle lithography to prepare spatially selective surface platforms of organosilanes that are suitable for nanoscale studies of protein binding. Particle lithography was applied for patterning fibrinogen, a plasma protein that has a major role in the clotting cascade for blood coagulation and wound healing. Surface nanopatterns of mercaptosilanes were designed as sites for the attachment of fibrinogen within a protein-resistant matrix of 2-[methoxy( polyethyleneoxy)propyl] trichlorosilane (PEG-silane). Preparing site-selective surfaces was problematic in our studies, because of the self-reactive properties of PEG-organosilanes. Certain organosilanes presenting hydroxyl head groups will cross react to form mixed surface multi-layers. We developed a clever strategy with particle lithography using masks of silica mesospheres to protect small, discrete regions of the surface from cross reactions. Images acquired with atomic force microscopy (AFM) disclose that fibrinogen attached primarily to the surface areas presenting thiol head groups, which were surrounded by PEG-silane. The activity for binding anti-fibrinogen was further evaluated using ex situ AFM studies, confirming that after immobilization the fibrinogen nanopatterns retained capacity for binding immunoglobulin G. Studies with AFM provide advantages of achieving nanoscale resolution for detecting surface changes during steps of biochemical surface reactions, without requiring chemical modification of proteins or fluorescent labels.

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Nanostructures of Cysteine-Coated CdS Nanoparticles Produced with “Two-Particle” Lithography

Cited by 26 publications

References 90 publications

Synthesis, characterization and antimicrobial property of Fe3O4-Cys-HNQ nanocomplex, with l-cysteine molecule as a linker

Synthesis, characterization and antimicrobial property of Fe3O4-Cys-HNQ nanocomplex, with l-cysteine molecule as a linker

Approaches for Sample Characterization and Lithography with Nanoparticles using Modes of Scanning Probe Microscopy

Spatially selective surface platforms for binding fibrinogen prepared by particle lithography with organosilanes

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