Self-assembly of the 3-aminopropyltrimethoxysilane multilayers on Si and hysteretic current–voltage characteristics

Chauhan, A. K.; Aswal, D. K.; Koiry, S. P.; Gupta, S. K.; Yakhmi, J. V.; Sürgers, Christoph; Guérin, David; Lenfant, S.; Vuillaume, D.

doi:10.1007/s00339-007-4336-7

Cited by 125 publications

(122 citation statements)

References 44 publications

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“…This additional state correlates to various possible interactions of the amine group with adsorbed water, the surface, and inter-and intramolecular silanol groups [9,19,26]. Consequently, the higher binding energy state can be attributed to multilayer formation, as amine groups then interact with the silanol groups of the next layer [19].…”

Section: Surface Analysismentioning

confidence: 94%

“…[8]. According to some studies, the contact angle changes rapidly after contact with air and higher values are generally associated with multilayers, whereas monolayers are described to be hydrophilic directly after modification [19,20]. As the short reaction times for the GP and LP did not yield lower contact angle values, multilayers appeared to have built already after 30 min of GP reaction, and 1 h of LP reaction.…”

Section: Surface Analysismentioning

confidence: 95%

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Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Steinbach

Sandner

Mizaikoff

et al. 2015

Phys. Status Solidi C

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Designing a microfabrication process for lab-on-a-chip systems can at times be challenging, and the need to integrate a chemical surface modification reaction into this process can limit the options. Therefore, a robust set-up and protocol for the gas phase modification has been developed that can be variably integrated into microfabrication processes. The main improvement compared to similar methods is, besides easy and versatile sample handling, the integration of a continuous argon flow percolating through the liquid organosilane, and impinging directly the surface to be modified. This measure reduces the argon consumption drastically compared to current reaction schemes, while keeping short reaction periods.Silicon substrates were modified using 3-mercaptopropyltrimethoxysilane (MPTMS) and 3-aminopropyltrimethoxysilane (APTMS), thoroughly studied for different reaction stages, and compared to surfaces modified via a common solvent-based procedure from isopropanolic solution. Water contact angle measurements, infrared spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy verified the successful deposition of the alkylsilane. Additionally, silicon nanowires were assembled, exemplary for a lab-on-a-chip system, in a liquid gate field-effect-transistor configuration, and electrically characterized. The devices showed the expected response to applied liquid gate potentials before and after the modification and exhibited characteristic changes in the transconductance curve.

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Section: Surface Analysismentioning

confidence: 94%

Section: Surface Analysismentioning

confidence: 95%

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Steinbach

Sandner

Mizaikoff

et al. 2015

Phys. Status Solidi C

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“…[21][22][23]30 Silanized substrates were fabricated from glass coverslips immersed in the APTES/toluene solution for 30 minutes and then sonicated in chloroform to form a monolayer. 31 A substrate containing patches of positively charged PLL on a glass sample was created by taking a clean glass petri dish and depositing a spot of PLL for 3 minutes from a liquid meniscus formed in air at the end of a 5 µm diameter dual barreled-pipette, using the fabrication capabilities of scanning electrochemical cell microscopy. 32 This sample was then washed with water and dried under ambient conditions.…”

Section: Methodsmentioning

confidence: 99%

Surface Charge Mapping with a Nanopipette

et al. 2014

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Nanopipettes are emerging as simple but powerful tools for probing chemistry at the nanoscale.In this contribution the use of nanopipettes for simultaneous surface charge mapping and topographical imaging is demonstrated, using a scanning ion conductance microscopy (SICM) format. When a nanopipette is positioned close to a surface in electrolyte solution the direct ion current (DC), driven by an applied bias between a quasi-reference counter electrode (QRCE) in the nanopipette and a second QRCE in the bulk solution is sensitive to surface charge. The charge sensitivity arises because the diffuse double layers at the nanopipette and the surface interact, creating a perm-selective region which becomes increasingly significant at low ionic strengths (10 mM 1:1 aqueous electrolyte herein). This leads to a polarity-dependent ion current and surface-induced rectification as the bias is varied. Using distance-modulated SICM, which induces an alternating ion current component (AC) by periodically modulating the distance between the nanopipette and the surface, the effect of surface charge on the DC and AC is explored and rationalized. The impact of surface charge on the AC phase (with respect to the driving sinusoidal signal) is highlighted in particular; this quantity shows a shift that is highly sensitive to interfacial charge and provides the basis for visualizing charge simultaneously with topography. The studies herein highlight the use of nanopipettes for functional imaging with applications from cell biology to materials characterization where understanding surface charge is of key importance.3

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“…10B). [214] Also, hysteresis and negative differential resistance [215,216] were observed from the SAMT devices, but not from the monolayer devices. The authors suggested that the transport in APTMS SAMTs is hopping.…”

Section: Thermally Activated Processesmentioning

confidence: 96%

Molecular Self‐Assembled Monolayers and Multilayers for Organic and Unconventional Inorganic Thin‐Film Transistor Applications

DiBenedetto¹,

Facchetti²,

Ratner³

et al. 2009

Advanced Materials

578

544

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Principal goals in organic thin‐film transistor (OTFT) gate dielectric research include achieving: (i) low gate leakage currents and good chemical/thermal stability, (ii) minimized interface trap state densities to maximize charge transport efficiency, (iii) compatibility with both p‐ and n‐ channel organic semiconductors, (iv) enhanced capacitance to lower OTFT operating voltages, and (v) efficient fabrication via solution‐phase processing methods. In this Review, we focus on a prominent class of alternative gate dielectric materials: self‐assembled monolayers (SAMs) and multilayers (SAMTs) of organic molecules having good insulating properties and large capacitance values, requisite properties for addressing these challenges. We first describe the formation and properties of SAMs on various surfaces (metals and oxides), followed by a discussion of fundamental factors governing charge transport through SAMs. The last section focuses on the roles that SAMs and SAMTs play in OTFTs, such as surface treatments, gate dielectrics, and finally as the semiconductor layer in ultra‐thin OTFTs.

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Self-assembly of the 3-aminopropyltrimethoxysilane multilayers on Si and hysteretic current–voltage characteristics

Cited by 125 publications

References 44 publications

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Surface Charge Mapping with a Nanopipette

Molecular Self‐Assembled Monolayers and Multilayers for Organic and Unconventional Inorganic Thin‐Film Transistor Applications

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