Uniformly dispersed deposition of colloidal nanoparticles and nanowires by boiling

Lee, Kyumin; Duchamp, Martial; Kulik, G.; Magrez, Arnaud; Seo, Jin Won; Jeney, Sylvia; Kulik, Andrzej; Forró, Lászlø; Sundaram, Ramesh; Brugger, Juergen

doi:10.1063/1.2803320

Cited by 31 publications

(20 citation statements)

References 18 publications

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“…Based on the presented data, it is reasonable to argue that highly ordered 3D films of cubic NPs, which could be prepared, for example, by boiling MCNP drops on preheated substrates17 or by Langmuir–Blodgett deposition, have potential to serve as nanoporous vapor sensors. Based on earlier results with cubic Au NPs,18 the dimensions of the nanopores can be controlled deliberately by adjusting the “sharpness” of the cubic‐NP edges.…”

Section: Methodsmentioning

confidence: 83%

Chemically Sensitive Resistors Based on Monolayer‐Capped Cubic Nanoparticles: Towards Configurable Nanoporous Sensors

Dovgolevsky

Tisch

Haick

2009

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The use of assemblies of monolayer-capped nanoparticles (MCNPs) to design chemically sensitive resistors (chemiresistors) has two main attributes. [1][2][3][4][5] The first is the presumed ability to synthesize, if not at will then with much control, nearly any type of MCNP one wishes. [6] The second is the ability to control the interparticle distance and uniformity in the films [1,2,6] that affect the background noise, [7] which, eventually, determines the device sensitivity. In addition, MCNP-based chemiresistors are especially simple to prepare, are inherently compatible with conventional silicon electronics processing and readout circuitry, and are therefore miniaturizable and scalable. [1,2] In this class of chemiresistors, the metallic particles provide the electric conductivity and the organic film provides sites for the sorption of analyte (guest) molecules. The presence of well-defined organic spacers (i.e., molecules) allows the interparticle distance to be controlled and, thereby, nearly uniform interparticle distances in the composite films to be obtained. [1,2] To date, MCNP-based chemiresistors were produced from nanoparticles (NPs) with spherical shapes. [1,2] Nevertheless, for many applications the use of spherical MCNPs as base materials for chemiresistors is hindered by two major limitations of their swellability. First, the voids between adjacent spherical MCNPs (30-60% of the total volume of the three-dimensional (3D) assembly) [1] can host analyte molecules during the exposure process, but do not (or hardly) contribute to the swelling-induced sensing signal (Scheme 1A). Second, the interface contacts between adjacent spherical MCNPs, at which analyte molecules adsorb and induce changes in the film, are relatively small compared to the total surface area of an individual spherical MCNP. The relatively small interface contacts could also suppress the efficiency of electron transfer (note that efficient electron transfer increases the signal-to-noise ratio). Herein, we show that 3D films made of cubic NPs [8] capped with organic monolayers provide significantly higher sensitivity towards volatile organic compounds (VOCs) than similar films made of spherical NPs. Our findings are explained in terms of the higher swellability of the cubic MCNP films (Scheme 1B).Polyacrylate-capped cubic Pt NPs and polyvinylpyrrolidone-capped spherical Pt NPs with a characteristic dimension of 6.0 AE 0.4 nm were synthesized by hydrogen [9] and heat [10] procedures, respectively. The polyacrylate and polyvinylpyrrolidone molecules coating the Pt NPs were then exchanged with dodecanethiol (DDT) in a THF/water medium, accompanied by subsequent transfer of the final DDT-capped NPs into toluene or chloroform. Theoretical considerations that are supported by transmission electron microscopy (TEM) analysis at different rotation angles of the TEM grid, which contains the NP assemblies, provided knowledge of the voids between adjacent NPs (see Figure 1). The results indicate that the voids between adjacent DDT-capped spher...

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Section: Methodsmentioning

confidence: 83%

Chemically Sensitive Resistors Based on Monolayer‐Capped Cubic Nanoparticles: Towards Configurable Nanoporous Sensors

Dovgolevsky

Tisch

Haick

2009

Small

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“…After the experiments on hard surfaces and calibration of the piezoscanner had been carried out, gold colloid beads of different sizes (Ted Pella, Inc) were deposited on top of a silicon substrate using the method described in [35]. Initially, two images of 150 nm diameter beads were conducted using the hybrid force mode ( figure 11(a)) and friction force mode ( figure 11(b)).…”

Section: Imaging Of Loose Objects On a Hard Surfacementioning

confidence: 99%

Gentle and fast atomic force microscopy with a piezoelectric scanning probe for nanorobotics applications

Acosta¹,

Polesel-Maris²,

Thoyer³

et al. 2013

Nanotechnology

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A novel dual tip nanomanipulation atomic force microscope (AFM) platform operating in ambient conditions is presented. The system is equipped with a high frequency quartz piezoelectric self-sensing scanning probe for fast imaging and a passive cantilever for manipulation. The system is validated by imaging and selective pushing/pulling of gold colloid beads (diameters from 80 to 180 nm). This provides a more compact integration compared to an external optical lever and avoids several of its drawbacks such as optical interference and noise, and recalibration in the case of a moving cantilever and a fixed laser source and photodiode sensor. Moreover, as the quartz oscillator exhibits oscillation amplitudes in the sub-picometer range with a resonant frequency in the megahertz range, this dynamic force sensor is ideal for fast AFM imaging. Experiments show an increase by five times in imaging speed compared to a classical AFM system.

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“…A number of nanoparticle deposition techniques were attempted with the goal of depositing isolated metal nanoparticles of sufficient density for imaging within the scan range of an AFM. Boiling-on-contact was the most successful in terms of distribution and sample quality [12]. In this method, the SrTiO 3 substrate is placed on a hot plate and allowed to heat to a temperature of 350…”

Section: B Fabrication and Testingmentioning

confidence: 99%

Determining the Electronic Properties of Individual Nanointerfaces by Combining Intermittent AFM Imaging and Contact Spectroscopy

Kraya

Bonnell

2010

IEEE Trans. Nanotechnology

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A method to determine the electronic properties at nanointerfaces or of nanostructures by utilizing intermittent contact atomic force microscopy and contact spectroscopy in one system is developed. By combining these two methods, the integrity of the interface or structure is maintained during imaging, while the extraction of the electronic information is obtained with contact spectroscopy. This method is especially vital for understanding interfaces between metal nanoparticles and substrates, where the nanoparticles are not tethered to the surface and can be combined with new and evolving techniques of thermal drift compensation to allow for a larger range of experiments on nanointerfaces and nanostructures in ambient environments. An experimental probe for quantifying the properties of individual interfaces with diameters in the range of 20 to 100 nm is developed, which is based on scanning probe microscopy. KeywordsAtomic force microscopy, metal nanoparticles, nanotechnology, semiconductor-metal interfaces, thermionic emission, transport Abstract-A method to determine the electronic properties at nanointerfaces or of nanostructures by utilizing intermittent contact atomic force microscopy and contact spectroscopy in one system is developed. By combining these two methods, the integrity of the interface or structure is maintained during imaging, while the extraction of the electronic information is obtained with contact spectroscopy. This method is especially vital for understanding interfaces between metal nanoparticles and substrates, where the nanoparticles are not tethered to the surface and can be combined with new and evolving techniques of thermal drift compensation to allow for a larger range of experiments on nanointerfaces and nanostructures in ambient environments. An experimental probe for quantifying the properties of individual interfaces with diameters in the range of 20 to 100 nm is developed, which is based on scanning probe microscopy.

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Uniformly dispersed deposition of colloidal nanoparticles and nanowires by boiling

Cited by 31 publications

References 18 publications

Chemically Sensitive Resistors Based on Monolayer‐Capped Cubic Nanoparticles: Towards Configurable Nanoporous Sensors

Chemically Sensitive Resistors Based on Monolayer‐Capped Cubic Nanoparticles: Towards Configurable Nanoporous Sensors

Gentle and fast atomic force microscopy with a piezoelectric scanning probe for nanorobotics applications

Determining the Electronic Properties of Individual Nanointerfaces by Combining Intermittent AFM Imaging and Contact Spectroscopy

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