Self-assembling bilayers of palladiumthiolates in organic media

Thomas, P. John; Lavanya, A.; Sabareesh, V.; Kulkarni, G. U.

doi:10.1007/bf02708794

Cited by 31 publications

(39 citation statements)

References 15 publications

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“…The present study reports a one‐step synthesis of Pd 4 S using palladium alkanethiolate. The precursor itself is simple to synthesize in high yields29, 30 and is amenable as a resist in lithography processes, opening up interesting possibilities, otherwise not possible with conventional precursors. The palladium alkanethiolate films heated in hydrogen atmosphere at 250 °C yielded pure and nanocrystalline Pd 4 S as seen by XRD and TEM measurements.…”

Section: Discussionmentioning

confidence: 99%

“…We considered it interesting to explore the use of palladium alkanethiolates as single‐source precursors to produce Pd compounds. Palladium alkanethiolates are unique in that they are soluble in common organic solvents and can be self‐assembled repeatedly 30. As reported from this laboratory, they serve as direct write resists in e‐beam lithography31 and enable micromolding 32.…”

Section: Introductionmentioning

confidence: 87%

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Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

Radha

Kulkarni

2010

Adv Funct Materials

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A simple, one‐step process to synthesize Pd4S films is reported here along with their characterization using X‐ray diffraction, electron microscopy, and electrical measurements. The synthesis involves thermolysis of a single‐source precursor, namely palladium alkanethiolate, in H2 atmosphere at 250 °C for 3 h. The films are highly conducting and resistant to strong acidic, alkali, and oxidizing environments. The precursor allows patterning of the Pd4S films by electron beam lithography and micromolding, an attribute that has been employed in making chemically resistant electrodes and etch masks. The conversion of palladium thiolate to other sulfide phases is also achieved.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

Radha

Kulkarni

2010

Adv Funct Materials

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“…The X‐ray diffraction (XRD) data (Figure 3) of the pristine Pd hexadecanethiolate film showed a series of low‐angle peaks (Figure 3a) characteristic of a lamellar structure with d (001) of 44.41 Å,36 the alkyl chains being predominantly in the all‐ trans conformation (see schematic diagram in Figure 3a). Unlike alkylthiolates of other metals, Pd alkylthiolates are highly soluble in common organic solvents and can be self‐assembled repeatedly 35, 36. The thermolyzed film (Figure 3b) showed mainly peaks corresponding to polycrystalline Pd metal, d (111) and d (200) at 2.24 and 1.94 Å, respectively (JCPDS, 461043).…”

Section: Resultsmentioning

confidence: 99%

A SERS‐Active Nanocrystalline Pd Substrate and its Nanopatterning Leading to Biochip Fabrication

Bhuvana

2008

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Nanocrystalline metallic Pd films have been produced by thermolysis of Pd hexadecanethiolate deposited on a Si surface. The particle size was in the range of 50-60 nm based on electron and atomic force microscopy. The Pd surface produced was found to be surface-enhanced Raman scattering (SERS) active with an enhancement factor of approximately 10(5). The electron-resist behavior of Pd thiolate is exploited in conceptualizing a prototype chip with patterned Pd regions that are SERS active, called "SERS bits", which host different biomolecules.

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“…Thin films ranging from 30 to 400 nm thick were spin‐coated on thoroughly cleaned substrates (silicon wafer/quartz/glass) by using 0.5–5 w/v% polymer solutions in HPLC‐grade toluene. PdSH, Pd(SC 16 H 33 ) 2 was prepared by mixing and vigorously stirring equal amounts of Pd acetate and hexadecanethiol in toluene 17. The resulting thiolate was dried and washed with methanol and acetonitrile to remove excess thiol and then dissolved in toluene.…”

Section: Methodsmentioning

confidence: 99%

Ultrafast Large‐Area Micropattern Generation in Nonabsorbing Polymer Thin Films by Pulsed Laser Diffraction

Verma

Sharma

2011

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An ultrafast, parallel, and beyond-the-master micropatterning technique for ultrathin (30-400 nm) nonabsorbing polymer films by diffraction of laser light through a 2D periodic aperture is reported. The redistribution of laser energy absorbed by the substrate causes self-organization of polymer thin films in the form of wrinklelike surface relief structures caused by localized melting and freezing of the thin film. Unlike conventional laser ablation and laser writing processes, low laser fluence is employed to only passively swell the polymer as a pre-ablative process without loss of material, and without absorption/reaction with incident radiation. Self-organization in the thin polymer film, aided by the diffraction pattern, produces microstructures made up of thin raised lines. These regular microstructures have far more complex morphologies than the mask geometry and very narrow line widths that can be an order of magnitude smaller than the openings in the mask. The microstructure morphology is easily modulated by changing the film thickness, aperture size, and geometry, and by changing the diffraction pattern.

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Self-assembling bilayers of palladiumthiolates in organic media

Cited by 31 publications

References 15 publications

Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

A SERS‐Active Nanocrystalline Pd Substrate and its Nanopatterning Leading to Biochip Fabrication

Ultrafast Large‐Area Micropattern Generation in Nonabsorbing Polymer Thin Films by Pulsed Laser Diffraction

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Self-assembling bilayers of palladiumthiolates in organic media

Cited by 31 publications

References 15 publications

Patterned Synthesis of Pd4S: Chemically Robust Electrodes and Conducting Etch Masks

Patterned Synthesis of Pd4S: Chemically Robust Electrodes and Conducting Etch Masks

A SERS‐Active Nanocrystalline Pd Substrate and its Nanopatterning Leading to Biochip Fabrication

Ultrafast Large‐Area Micropattern Generation in Nonabsorbing Polymer Thin Films by Pulsed Laser Diffraction

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Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks

Patterned Synthesis of Pd₄S: Chemically Robust Electrodes and Conducting Etch Masks