Spatial variations of conductivity of self-assembled monolayers of dodecanethiol on Au/mica and Au/Si substrates

• Julian Skolaut,
• Jędrzej Tepper,
• Federica Galli,
• Wulf Wulfhekel and
• Jan M. van Ruitenbeek

Beilstein J. Nanotechnol. 2023, 14, 1169–1177, doi:10.3762/bjnano.14.97

• /Si; conductive atomic force microscopy; dodecanethiol; self-assembled monolayers; Introduction For decades, the need for miniaturization of electronics has pushed the research field into the direction of bottom-up, rather than top-down, approaches. In this research field, molecular electronics [1][2

• of current characteristics strongly depends on the substrate chosen to deposit the SAM onto. For this study, we employ alkane thiols, which are allowed to form a SAM on different types of Au substrates. We have chosen dodecanethiol (DDT) molecules and study them on commercially available Au

• deposition can be made. Overall, five areas were investigated on Au/mica and three for Au/Si, which all showed consistent images. Dodecanethiol SAMs on Au/mica Figure 3 shows images of the DDT-covered Au/mica surface obtained after the deposition procedure described above. In total, four different areas on

Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

• Roopakala Kottayi,
• Ilangovan Veerappan and
• Ramadasse Sittaramane

Beilstein J. Nanotechnol. 2022, 13, 1337–1344, doi:10.3762/bjnano.13.110

• (GaCl3), sulfur powder (S), 1-dodecanethiol (DDTh), ʟ-cysteine, copper(II) chloride, polyvinylidene fluoride (PVDF), titanium isisopropoxide (TIP), glycerol, oleylamine (OAM), titanium tetrachloride (TiCl4), N-methyl-2-pyrrolidine (NMP), chloroform, acetonitrile, ethanol, and methanol were purchased from

A Au/CuNiCoS₄/p-Si photodiode: electrical and morphological characterization

• Adem Koçyiğit,
• Adem Sarılmaz,
• Teoman Öztürk,
• Faruk Ozel and
• Murat Yıldırım

Beilstein J. Nanotechnol. 2021, 12, 984–994, doi:10.3762/bjnano.12.74

• nanocrystals. Also, I–V and C–V measurements were performed to determine the photodiode and capacitance characteristics of the Au/CuNiCoS4/p-Si devices. Experimental Materials Copper(II) acetate (CuAc2), nickel(II) acetate (NiAc2), cobalt acetate (CoAc2), trioctylphosphine oxide (TOPO), 1-dodecanethiol (DDT

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

• Sepand Tehrani Fateh,
• Lida Moradi,
• Elmira Kohan,
• Michael R. Hamblin and
• Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

Silver nanoparticles nucleated in NaOH-treated halloysite: a potential antimicrobial material

• Yuri B. Matos,
• Rodrigo S. Romanus,
• Mattheus Torquato,
• Edgar H. de Souza,
• Rodrigo L. Villanova,
• Marlene Soares and
• Emilson R. Viana

Beilstein J. Nanotechnol. 2021, 12, 798–807, doi:10.3762/bjnano.12.63

• matrix and additive was tested through coating the Ag-NPs with dodecanethiol, a non-polar surfactant. The resulting composites were characterized by scanning electron microscopy and in terms of surface antimicrobial activity. The results demonstrate that the Ag-NPs synthesized in this work are indeed

• the potential of the Ag-NPs for industrial application by dispersing them into low-density polyethylene (LDPE) and evaluating the chemical compatibility between matrix and additive by testing a dodecanethiol (DIO) coating to improve the dispersion of the Ag-NPs into LDPE. The resulting composites were

• then evaluated in terms of surface antimicrobial activity. Experimental Halloysite (>99%), silver nitrate (AgNO3(s), >99%), and dodecanethiol were obtained from Sigma-Aldrich; sodium hydroxide (NaOH(s), >99%) was purchased from Alpha Quimica; low-density polyethylene (LDPE) was purchased from Braskem

A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO₂ nanotubes with a hydrophobic layer

• Caihong Liang,
• Jiang Wen and
• Xiaoming Liao

Beilstein J. Nanotechnol. 2018, 9, 1793–1801, doi:10.3762/bjnano.9.170

• -layer titania nanotubes (TNTs) fabricated using by an in situ voltage up-anodization process. The visible-light photocatalytic activity is improved by loading Ag onto the TNTs by NaBH4 reduction. Then, the TNTs containing Ag nanoparticles were modified with dodecanethiol (NDM) to create a hydrophobic

• structural modification of TiO2 nanotubes. We decorated AgNPs onto two-layer TNTs fabricated by an in situ voltage up-anodization technique to improve the availability of visible light. In addition, we coated a hydrophobic organic layer (dodecanethiol) directly onto the hydrophilic surface of the nanotubes

• platform. Experimental Materials Commercially pure titanium sheets (10 × 10 × 1 mm3) were purchased from Luoke Titanium Industry (Chengdu, China). Acetone was purchased from Changlian Chemical (Analytic Reagent, AR, Chengdu, China). Ethanol, dodecanethiol (NDM), ammonium fluoride (NH4F), ethylene glycol

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

• Sven Oras,
• Sergei Vlassov,
• Marta Berholts,
• Rünno Lõhmus and
• Karine Mougin

Beilstein J. Nanotechnol. 2018, 9, 660–670, doi:10.3762/bjnano.9.61

• with self-assembled monolayers ending with a hydrophobic (methyl –CH3), partially hydrophilic (–OCH3) and hydrophilic group (hydroxyl –OH, thiol –SH, carboxylic –COOH, amino –NH2). Dodecanethiol for methyl terminated coating (referred to as –CH3), 3-(triethoxysilyl)propane-1-thiol for methoxy

Thermo- and electro-optical properties of photonic liquid crystal fibers doped with gold nanoparticles

• Agata Siarkowska,
• Miłosz Chychłowski,
• Daniel Budaszewski,
• Bartłomiej Jankiewicz,
• Bartosz Bartosewicz and
• Tomasz R. Woliński

Beilstein J. Nanotechnol. 2017, 8, 2790–2801, doi:10.3762/bjnano.8.278

• fabricated by using a modification of the method reported elsewhere [29]. Au NPs were synthesized by borohydride reduction of gold salts in water. To 10 mL of the Au NP colloidal solution 5 mL of chloroform and 20 µL of 1-dodecanethiol (DDT) were added. A hydrophobic shell on the NP surface was formed by DDT

The role of ligands in coinage-metal nanoparticles for electronics

• Ioannis Kanelidis and
• Tobias Kraus

Beilstein J. Nanotechnol. 2017, 8, 2625–2639, doi:10.3762/bjnano.8.263

• surface. The small chalcogenides supported the formation of close-packed nanoparticle solids, and their deposition at 80 °C led to efficient charge transport with enhanced conductivity values (103 S/cm) compared to layers of dodecanethiol-capped gold nanocrystals (10−9 S/cm) [128]. In metal nanowires

Fixation mechanisms of nanoparticles on substrates by electron beam irradiation

• Daichi Morioka,
• Tomohiro Nose,
• Taiki Chikuta,
• Kazutaka Mitsuishi and
• Masayuki Shimojo

Beilstein J. Nanotechnol. 2017, 8, 1523–1529, doi:10.3762/bjnano.8.153

• nanoparticles using a field-emission scanning electron microscope (SEM, JEOL JSM7800-UHV), to immobilize particles on the substrate. The fixing mechanisms are described elsewhere [8]. The substrate was rinsed using ultra-sonication in an ethanol solution of dodecanethiol for 10 min to remove unfixed particles

• . Dodecanethiol and ethanol were purchased from Wako Co., Ltd., Japan. The substrate was observed with SEM and the width of the area in which the nanoparticles remained was measured. To show the versatility of this technique silica nanoparticles were also fixed. An Au thin film, the thickness of which was about 5

ZnO nanoparticles sensitized by CuInZn_xS_2+x quantum dots as highly efficient solar light driven photocatalysts

• Florian Donat,
• Serge Corbel,
• Halima Alem,
• Steve Pontvianne,
• Lavinia Balan,
• Ghouti Medjahdi and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

• acetate (Zn(OAc)2, 99.99%, Sigma), copper iodide (CuI, 99.999%, Sigma), dodecanethiol (DDT, >98%, Sigma), oleylamine (OA, 70%, Sigma), 1-octadecene (ODE, 90%, Sigma), zinc oxide (ZnO, 99%, Alfa Aesar), disodium terephthalate (DST, 99+%, Alfa), nitrotetrazolium blue chloride (NBT, >98%, Sigma), leuco

• range of 250–1400 nm. Results and Discussion ZnO/ZCIS photocatalyst synthesis and characterization QDs with a CIS core were prepared by a high temperature decomposition method in the noncoordinating solvent 1-octadecene using In(OAc)3, CuI and dodecanethiol (DTT) as starting materials. DDT serves both

Impact of surface wettability on S-layer recrystallization: a real-time characterization by QCM-D

• Jagoba Iturri,
• Ana C. Vianna,
• Alberto Moreno-Cencerrado,
• Dietmar Pum,
• Uwe B. Sleytr and
• José Luis Toca-Herrera

Beilstein J. Nanotechnol. 2017, 8, 91–98, doi:10.3762/bjnano.8.10

• previous studies as developed by our group for different types of hydrophobic alkylsilanes (octadecyltrichlorosilane) [17] and alkylthiols (dodecanethiol and hexanethiol) [18] on silica and gold, respectively. In those cases the real-time analysis differed significantly from the one carried out here

Solvent-mediated conductance increase of dodecanethiol-stabilized gold nanoparticle monolayers

• Patrick A. Reissner,
• Jean-Nicolas Tisserant,
• Antoni Sánchez-Ferrer,
• Raffaele Mezzenga and
• Andreas Stemmer

Beilstein J. Nanotechnol. 2016, 7, 2057–2064, doi:10.3762/bjnano.7.196

• solution containing conjugated thiol-functionalized molecules. Typically, this observation is attributed to molecular exchange. Less attention has been paid to the role of the solvent alone. Here, we report on an increase in conductance of dodecanethiol-stabilized gold nanoparticle monolayers on Si/SiO2 by

• (SAXS) were synthesized [14], functionalized by 1-dodecanethiol [15], assembled to form a monolayer [16], and deposited onto an Si/SiO2 substrate using a patterned poly(dimethylsiloxane) (PDMS) stamp [17]. A detailed description of all steps is provided in the methods section. The resulting pattern of

• -Waals forces rather decrease slightly in a liquid medium in comparison to air. A slow compaction of the nanoparticle monolayer as we observed may be caused either by a collapse of alkyl tails or by partial interdigitation of alkyl tails between nanoparticles. The good solubility of 1-dodecanethiol in

Cantilever bending based on humidity-actuated mesoporous silica/silicon bilayers

• Christian Ganser,
• Gerhard Fritz-Popovski,
• Roland Morak,
• Parvin Sharifi,
• Benedetta Marmiroli,
• Barbara Sartori,
• Heinz Amenitsch,
• Thomas Griesser,
• Christian Teichert and
• Oskar Paris

Beilstein J. Nanotechnol. 2016, 7, 637–644, doi:10.3762/bjnano.7.56

• coating on one side. The cantilevers were immersed in 2 M NaOH aqueous solution for 40 min, rinsed with ethanol and dried in a flow of inert gas (N2 or CO2). In the next step, the gold coating of the cantilever was hydrophobized using self-assembled monolayers (SAM) of dodecanethiol (≥98%, 471364-100ML

Fabrication and properties of luminescence polymer composites with erbium/ytterbium oxides and gold nanoparticles

• Julia A. Burunkova,
• Ihor Yu. Denisiuk,
• Dmitri I. Zhuk,
• Lajos Daroczi,
• Attila Csik,
• István Csarnovics and
• Sándor Kokenyesi

Beilstein J. Nanotechnol. 2016, 7, 630–636, doi:10.3762/bjnano.7.55

• (436909 ALDRICH, UDMA); isodecyl acrylate (408956 ALDRICH, IDA); initiator 2,2-dimethoxy-2-phenylacetophenone (19611-8 Aldrich, In2); dodecanethiol-functionalized gold nanoparticles, 5 nm (Nanoprobes,no. 3014, AuNPs); erbium chloride (Aldrich, 449792, ErCl3); ytterbium chloride (Aldrich, 439614, YbCl3

Case studies on the formation of chalcogenide self-assembled monolayers on surfaces and dissociative processes

• Yongfeng Tong,
• Tingming Jiang,
• Azzedine Bendounan,
• Makri Nimbegondi Kotresh Harish,
• Angelo Giglia,
• Stefan Kubsky,
• Fausto Sirotti,
• Luca Pasquali,
• Srinivasan Sampath and
• Vladimir A. Esaulov

Beilstein J. Nanotechnol. 2016, 7, 263–277, doi:10.3762/bjnano.7.24

• . The thiols attach to these “extracted adatoms”. In order to shed light on characteristics of thiol adsorption, we first studied [48] sulfur adsorption on Pd(111) since CLBEs for S on the √7 phase were not known. Thereafter, dodecanethiol (C12T) adsorption was performed on pristine Pd. We also

Surfactant-controlled composition and crystal structure of manganese(II) sulfide nanocrystals prepared by solvothermal synthesis

• Elena Capetti,
• Anna M. Ferretti,
• Vladimiro Dal Santo and
• Alessandro Ponti

Beilstein J. Nanotechnol. 2015, 6, 2319–2329, doi:10.3762/bjnano.6.238

• ][21][27], organic (thiourea [16], thioacetamide [26], bistrimethylsilylsulfide [18], dodecanethiol [30]) and inorganic (sulfur [22][23][24][28], ammonium sulfide [29]) compounds. The S/Mn molar ratio varied greatly, ranging from (1/3):1 to 4:1, but in most cases S/Mn ≥ 1. Use of S/Mn < 1 was

• Mn2(CO)10); the S/Mn molar ratio (from 0:1 to 4:1); the free surfactant (L = stearic acid (StAc), hexadecylamine (HdAm), dodecylamine (DdAm), octadecylamine (OdAm), oleylamine (OlAm), oleylalcohol (OlAl), or dodecanethiol (DdTh)); and the L/Mn molar ratio (from 0:1 to 4:1). Characterization

• . (a) γ-MnS NCs synthesized using L = HdAm; (b) α-MnS NCs synthesized using L = DdTh (where DdTh = dodecanethiol). The contrast of the outer part of both diffraction patterns was digitally increased to show high-index rings. TEM images (left) and electron diffraction patterns (right) of NCs obtained by

Nano-contact microscopy of supracrystals

• Adam Sweetman,
• Nicolas Goubet,
• Ioannis Lekkas,
• Marie Paule Pileni and
• Philip Moriarty

Beilstein J. Nanotechnol. 2015, 6, 1229–1236, doi:10.3762/bjnano.6.126

• shell of nanoparticles [35]. Experimental The Au nanocrystals used here were synthesized using a modified organometallic reduction method [36]. Briefly, 0.25 mmol of chloro(triphenylphosphine)gold(I) was dissolved in 25 mL of toluene and 250 μL of dodecanethiol. The reducing solution was made with 2.5

Inorganic Janus particles for biomedical applications

• Isabel Schick,
• Steffen Lorenz,
• Dominik Gehrig,
• Stefan Tenzer,
• Wiebke Storck,
• Karl Fischer,
• Dennis Strand,
• Frédéric Laquai and
• Wolfgang Tremel

Beilstein J. Nanotechnol. 2014, 5, 2346–2362, doi:10.3762/bjnano.5.244

• nanoparticles; JP: Janus particles). The gold domains were functionalized using 1-dodecanethiol (DDT) or 1-octadecanethiol (ODT). Adapted with permission from [32]. Copyright 2006 American Chemical Society. (A) SEM top view image of a typical kaolinite platelet (left), schematic picture of kaolinite platelets

Localized surface plasmon resonances in nanostructures to enhance nonlinear vibrational spectroscopies: towards an astonishing molecular sensitivity

• Dan Lis and
• Francesca Cecchet

Beilstein J. Nanotechnol. 2014, 5, 2275–2292, doi:10.3762/bjnano.5.237

• of the Au NPs. According to the authors, the overall SFG signal from a dodecanethiol SAM was increased by one order of magnitude. If considering an ideal 100% surface coverage in Au NPs (which was not the case), the minimum amplification factor that can be deduced is 100. Also an important

Nanocrystalline ceria coatings on solid oxide fuel cell anodes: the role of organic surfactant pretreatments on coating microstructures and sulfur tolerance

• Chieh-Chun Wu,
• Ling Tang and
• Mark R. De Guire

Beilstein J. Nanotechnol. 2014, 5, 1712–1724, doi:10.3762/bjnano.5.181

• coatings from aqueous solution, were applied to anodes of solid oxide fuel cells. The cells were then operated in hydrogen/nitrogen fuel streams with H2S contents ranging from 0 to 500 ppm. Two surfactant treatments were studied: immersion in dodecanethiol, and a multi-step conversion of a siloxy-anchored

• the thiol treatment, the cleaned substrates were immersed in 1-dodecanethiol (CH3C11H22SH) for 5 h at room temperature in air, then washed in flowing ethanol for 2 min and in deionized water for 2 min. For the sulfonate treatment, the cleaned cells were immersed in 1 vol % 1-bromo-11-(trichlorosilyl

Growth evolution and phase transition from chalcocite to digenite in nanocrystalline copper sulfide: Morphological, optical and electrical properties

• Priscilla Vasthi Quintana-Ramirez,
• Ma. Concepción Arenas-Arrocena,
• José Santos-Cruz,
• Marina Vega-González,
• Omar Martínez-Alvarez,
• Víctor Manuel Castaño-Meneses,
• Laura Susana Acosta-Torres and
• Javier de la Fuente-Hernández

Beilstein J. Nanotechnol. 2014, 5, 1542–1552, doi:10.3762/bjnano.5.166

• products were obtained from both reactions. Reagents For the organic reaction: copper(I) acetate (C2H3CuO2, Sigma-Aldrich, 97%), tri-n-octylphosphine oxide (OP(C8H17)3, TOPO Sigma-Aldrich, ≥98%), 1-dodecanethiol (C12H25SH, Aldrich, ≥98%), and dichlorobenzene (C6H4Cl2, Sigma-Aldrich 99%) were used as

Synthesis, characterization, and growth simulations of Cu–Pt bimetallic nanoclusters

• Subarna Khanal,
• Ana Spitale,
• Nabraj Bhattarai,
• Daniel Bahena,
• J. Jesus Velazquez-Salazar,
• Sergio Mejía-Rosales,
• Marcelo M. Mariscal and
• Miguel José-Yacaman

Beilstein J. Nanotechnol. 2014, 5, 1371–1379, doi:10.3762/bjnano.5.150

• . Experimental Chemicals and materials Reagent-grade chemicals from Sigma-Aldrich such as chloroplatinic acid hydrate (H2PtCl6·xH2O, 99.9%), copper(I) acetate (CuCO2CH3, 97%), tetraoctylammonium bromide (TOAB, 99%), hexadecyltrimethylammonium bromide (CTAB), sodium borohydrate (NaBH4), 1-dodecanethiol, toluene

• formation of Cu nanoparticles. Then 36 μL of 1-dodecanethiol was added to stabilize the Cu nanoparticles. After preparing the Cu nanoparticles, 3 mL of the Pt precursor solution was quickly added into the colloidal solution and after 5 min of waiting NaBH4 (72 μL, 4.6 M) was added and the heating was

Purification of ethanol for highly sensitive self-assembly experiments

• Kathrin Barbe,
• Martin Kind,
• Christian Pfeiffer and
• Andreas Terfort

Beilstein J. Nanotechnol. 2014, 5, 1254–1260, doi:10.3762/bjnano.5.139

• preparation conditions were tested by exposing them to solutions of a test substance (dodecanethiol). As proof of concept, the applicability for ethanol purification was demonstrated by employing the sensoric principle developed by Bohn et al. [29][32]. Results and Discussion Several methods exist to deposit

• thiols and other surface-active impurities from ethanol was tested by varying the gold load at the zeolite as well as the gold-NP preparation temperature. Dodecanethiol was used as test substance for these chemisorption experiments because it binds effectively and fast to gold surfaces [3]. In a typical

• test, one gram of the zeolite loaded with different amounts of gold-NPs was stirred into solutions of dodecanethiol in ethanol. After ten minutes, the solution was tested for remaining thiol using Ellman’s reagent. By increasing the concentrations of the solutions in small steps until the test became

Surface assembly and nanofabrication of 1,1,1-tris(mercaptomethyl)heptadecane on Au(111) studied with time-lapse atomic force microscopy

• Tian Tian,
• Burapol Singhana,
• Lauren E. Englade-Franklin,
• Xianglin Zhai,
• T. Randall Lee and
• Jayne C. Garno

Beilstein J. Nanotechnol. 2014, 5, 26–35, doi:10.3762/bjnano.5.3

• ; essentially, the well-known dimensions of n-alkanethiol monolayers furnish an in situ ruler for local measurements of the thickness of molecular films [7][34][35][36]. Our protocols for nanografting used either dodecanethiol or TMMH as matrix SAMs that were prepared by immersion in ethanolic solutions. Areas

• the TMMH matrix. Since a double layer of MUA would be 3.0 nm thick, this analysis likewise indicates a height of ~1 nm for the SAM derived from TMMH. Further experiments were conducted with nanografting of TMMH nanopatterns within a methyl-terminated dodecanethiol SAM (Figure 7). The dodecanethiol SAM

• was prepared from 1 mM ethanolic solution, and the TMMH nanografted patterns were prepared with 0.01 mM solution. The expected thickness of a dodecanethiol SAM is 1.5 nm, as a reference for evaluating the thickness of TMMH nanostructures. Four nanopatterns were written within the methyl-terminated SAM