Structure, Electrochemistry and Applications of Self‐Assembled Monolayers of Thiols

Buck, Manfred

doi:10.1002/9783527627059.ch5

Cited by 3 publications

(2 citation statements)

References 272 publications

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“…1 ), nucleation can occur at different types of defects, as illustrated in Fig. 2 and discussed in more detail in [ 47 ]. Imperfections such as domain boundaries, substrate steps, missing molecules or contaminations can all serve as nucleation sites.…”

Section: Resultsmentioning

confidence: 99%

Electron-beam patterned self-assembled monolayers as templates for Cu electrodeposition and lift-off

She¹,

Falco²,

Hähner³

et al. 2012

Beilstein J. Nanotechnol.

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SummarySelf-assembled monolayers (SAMs) of 4'-methylbiphenyl-4-thiol (MBP0) adsorbed on polycrystalline gold substrates served as templates to control electrochemical deposition of Cu structures from acidic solution, and enabled the subsequent lift-off of the metal structures by attachment to epoxy glue. By exploiting the negative-resist behaviour of MBP0, the SAM was patterned by means of electron-beam lithography. For high deposition contrast a two-step procedure was employed involving a nucleation phase around −0.7 V versus Cu2+/Cu and a growth phase at around −0.35 V versus Cu2+/Cu. Structures with features down to 100 nm were deposited and transferred with high fidelity. By using substrates with different surface morphologies, AFM measurements revealed that the roughness of the substrate is a crucial factor but not the only one determining the roughness of the copper surface that is exposed after lift-off.

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Section: Resultsmentioning

confidence: 99%

Electron-beam patterned self-assembled monolayers as templates for Cu electrodeposition and lift-off

She¹,

Falco²,

Hähner³

et al. 2012

Beilstein J. Nanotechnol.

Self Cite

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“…In this case, a suitable bioreceptor molecule is immobilized on or near the surface of the transducer and, depending on the characteristics of the immobilization process, namely physical entrapment or chemical attachment, the performance and selectivity of biosensors can be enhanced, thus achieving diminished interferences in a complex sample 2 and protection against degradation. 3 Self-assembled monolayers (SAMs) and template methods have proved to be suitable approaches for the biofunctionalization of electrodes when aiming for uniform surface chemical characteristics and reactivity at a molecular level.…”

Section: Introductionmentioning

confidence: 99%

Selective in situ functionalization of biosensors on LOC devices using laminar co-flow

et al. 2012

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Many applications involving lab-on-a-chip (LOC) devices are prevented from entering the market because of difficulties to achieve mass production and impart suitable properties allowing long-term storage. To integrate biosensors on these microfluidic chips, one of the main restrictions is the fabrication and stability of the molecular modifications that must be performed on the surfaces of the sensors for a given application. The complexity of the problem increases exponentially when the LOC integrates several of these sensors. Here we present a system based on laminar co-flow to perform an on-chip selective surface bio-functionalization of LOC-integrated sensors. This method has the advantage that the surface modification protocols are performed in situ before analyte detection. This approach reduces the burdens during LOC fabrication, keeping the required reagents stored outside of the detection structure in suitable wet conditions. The proof of concept is demonstrated through an optical characterization followed by electronic detection based on a novel differential impedance measurement setup. The system can be easily scaled to incorporate several sensors with distinct biosensing targets in a single chip.

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Organic surfaces exposed by self-assembled organothiol monolayers: Preparation, characterization, and application

Kind

Wöll

2009

Progress in Surface Science

265

204

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Structure, Electrochemistry and Applications of Self‐Assembled Monolayers of Thiols

Cited by 3 publications

References 272 publications

Electron-beam patterned self-assembled monolayers as templates for Cu electrodeposition and lift-off

Electron-beam patterned self-assembled monolayers as templates for Cu electrodeposition and lift-off

Selective in situ functionalization of biosensors on LOC devices using laminar co-flow

Organic surfaces exposed by self-assembled organothiol monolayers: Preparation, characterization, and application

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