The modification of surfaces by the deposition a robust overlayer provides an excellent handle with which to tune properties bulk substrate those interest. Such control over surface becomes increasingly important continuing efforts at down-sizing active components in optoelectronic devices, and corresponding increase area/volume ratio. Relevant include degree is wetted water or oil. Analogously, for biosensing applications there increasing interest so-called "romantic surfaces": that repel...

Superhydrophobic and superamphiphobic toward superoleophobic polymeric surfaces of polymethyl methacrylate (PMMA), polyether ether ketone (PEEK), polydimethyl siloxane (PDMS) are fabricated in a two-step process: (1) plasma texturing (i.e., ion-enhanced etching with simultaneous roughening), varying chemistry depending on the polymer, subsequently (2) grafting self-assembled perfluorododecyltrichlorosilane monolayers (SAMs). Depending absence or not an etch mask colloidal microparticle...

Nonspecific adsorption of biomolecules to solid surfaces, a process called biofouling, is major concern in many biomedical applications. Great effort has been made the development antifouling polymer coatings that are capable repelling nonspecific proteins, cells, and micro-organisms. In this respect, we herein contribute understanding factors determine which brush results best coating. To end, compared five different monomers: two sulfobetaines, carboxybetaine, phosphocholine, hydroxyl...

A comparative study is presented of the hydrolytic and thermal stability 24 different kinds monolayers on Si(111), Si(100), SiC, SiN, SiO2, CrN, ITO, PAO, Au, stainless steel surfaces. These surfaces were modified utilizing appropriate organic compounds having a constant alkyl chain length (C18), but with surface-reactive groups, such as 1-octadecene, 1-octadecyne, 1-octadecyltrichlorosilane, 1-octadecanethiol, 1-octadecylamine 1-octadecylphosphonic acid. The obtained was systematically...

The host-guest system TCNQ@Cu3BTC2 (TCNQ = 7,7,8,8-tetracyanoquinodimethane, BTC 1,3,5-benzenetricarboxylate) is a striking example of how semiconductivity can be introduced by guest incorporation in an otherwise insulating parent material. Exhibiting both microporosity and semiconducting behavior such materials offer exciting opportunities as next-generation sensor materials. Here, we apply solvent-free vapor phase loading under rigorous exclusion moisture, obtaining series the general...

Computationally predicted N 1s core level energies are commonly used to interpret the experimental measurements obtained with X-ray photoelectron spectroscopy. This work compares application of Koopmans' theorem electrons using B3LYP functional two basis sets, analyzes factors relevant comparison computational data, and presents several correlations that allow an accurate prediction binding energy. The first correlation is a series known nitrogen-containing groups on well-characterized...

We developed a strategy to prepare new types of zwitterionic polymer network (ZPN) coatings that display excellent self-healing and anti-biofouling properties.

Here, we report a platform for the specific capture of tdEVs, followed by their <italic>in situ</italic> characterization using SEM, Raman spectroscopy and AFM, at single EV level, in terms size, size distribution chemical fingerprinting.

Novel methods to make synthetic chiral polymers are highly desirable given their potential in a rapidly increasing number of bio-inspired applications. The enantiospecific sulfur-fluorine exchange (SuFEx) reaction di-sulfonimidoyl fluorides (di-SFs) with diphenols, was used produce high-molecular-weight configurational backbone chirality. resulting new class polymers, polysulfonimidates, can be efficiently produced via this step-growth mechanism for wide range di-SFs and yielding M

Abstract The preparation and characterization of butylene‐terminated silicon nanoparticles (SiNPs) their functionalization using thiol‐ene chemistry is described, as well the coupling DNA strands. Bromide‐terminated SiNPs were prepared by means oxidation magnesium silicide functionalized with butylene chains through treatment corresponding Grignard reagent. successful was confirmed NMR FTIR spectroscopy. TEM measurements revealed a silicon‐core diameter (2.4±0.5) nm. fluorescence emission...

New fluorine-containing terminal alkynes were synthesized and self-assembled onto Si(111) substrates to obtain organic monolayers. The monolayers analyzed in detail by ellipsometry, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared reflection absorption (FT-IRRAS), static water contact angle measurements (CA), atomic force microscopy (AFM). SAMs exhibit excellent hydrophobicity, with angles of up 119° low critical surface tensions 5–20 mN/m depending on the number F atoms...

Molecular monolayer doping (MLD) presents an alternative to achieve of silicon in a nondestructive way and holds potential for realizing ultrashallow junctions nonplanar surfaces. Here, we report the mixing dopant-containing alkenes with that lack this functionality at various ratios control dopant concentration resulting concomitantly dose substrate. The mixed monolayers were grafted onto hydrogen-terminated using well-established hydrosilylation chemistry. Contact angle measurements, X-ray...

Abstract The constraints of minute reactant amounts and the impossibility to remove any undesired surface‐bound products during monolayer functionalization a surface necessitate selection efficient, modular orthogonal reactions that lead quantitative conversions. Herein, we explore character sulfur–fluoride exchange (SuFEx) on surface, applicability for functionalization. To this end, demonstrate use ethenesulfonyl fluoride (ESF) as an efficient SuFEx linker creating “SuFEx‐able” surfaces,...

Abstract The products of the SuFEx reaction between sulfonimidoyl fluorides and phenols, sulfonimidates, are shown to display dynamic covalent chemistry with other phenols. This was be enantiospecific, finished in minutes at room temperature high yields, useful for both asymmetric synthesis sustainable polymer production. Its wide scope further extends usefulness related click chemistries.

Cu-free "click" chemistry is explored on silicon nitride (Si(3)N(4)) surfaces as an effective way for oriented immobilization of biomolecules. An ω-unsaturated ester was grafted onto Si(3)N(4) using UV irradiation. Hydrolysis followed by carbodiimide-mediated activation yielded surface-bound active succinimidyl and pentafluorophenyl groups. These reactive were employed the attachment bicyclononyne with amine spacer, which subsequently enabled room temperature strain-promoted azide-alkyne...

Abstract Die Modifizierung von Oberflächen durch robuste Abscheidung einer Deckschicht bietet eine hervorragende Möglichkeit, die Eigenschaften eines sterisch anspruchsvollen Substrats auf eigenen Interessen abzustimmen. Eine solche Kontrolle über Oberflächeneigenschaften gewinnt immer mehr an Bedeutung mit der stetigen Verkleinerung aktiver Bestandteile in allen möglichen optoelektronischen Geräten ebenso wie dem entsprechend größeren Oberfläche/Volumen‐Verhältnis. relevante einzustellende...

A series of different thicknesses fluoro poly(2,2,2-trifluoroethyl methacrylate) and its analogous nonfluoro poly(ethyl polymer brushes were prepared via surface-initiated ATRP (SI-ATRP) on Si(111) surfaces. The thiol-yne click reaction was used to immobilize the SI-ATRP initiator with a high surface coverage, in order achieve denser (grafting density from ~0.1 0.8 chains/nm(2)). All characterized by static water contact angle measurements, infrared absorption reflection spectroscopy, X-ray...

The ability to selectively chemically functionalize silicon nitride (Si3N4) or dioxide (SiO2) surfaces after cleaning would open interesting technological applications. In order achieve this goal, the chemical composition of needs be carefully characterized so that target reactions can proceed on only one surface at a time. While wet-chemically cleaned have been shown terminated with surficial Si–OH sites, HF-etched is more controversial. work, we removed native oxide under various aqueous...

Organic monolayers derived from ω-fluoro-1-alkynes of varying carbon chain lengths (C(10)-C(18)) were prepared on Si(111) surfaces, resulting in changes the physical and electronic properties surface. Analysis using XPS, Infrared Reflection Absorption Spectroscopy, ellipsometry static water contact angle measurements provided information regarding monolayer thickness, tilt angle, surface coverage. Additionally, PCFF molecular mechanics studies used to obtain optimal packing density layer...

The effects of fluorination on the adhesion and friction properties covalently bound poly(fluoroalkyl methacrylate) polymer brushes (thickness ∼80 nm) were systematically investigated. Si(111) surfaces functionalized with a initiator via thiol–yne click reaction to have high surface coverage for immobilization. Surface-initiated atom-transfer radical polymerization (SI-ATRP) was employed synthesis four different fluoropolymer (SPFx, where x = 0, 3, 7, or 17 F atoms per monomer), based...

In order to achieve improved tribological and wear properties at semiconductor interfaces, we have investigated the thermal grafting of both alkylated fluorine-containing ((C(x)F(2x+1))-(CH2)n-) 1-alkynes 1-alkenes onto silicon carbide (SiC). The resulting monolayers display static water contact angles up 120°. chemical composition covalently bound was studied by X-ray photoelectron spectroscopy (XPS), infrared reflection-absorption (IRRAS), near-edge absorption fine structure (NEXAFS)...

Silicon nanoparticles (Si NPs) are highly attractive materials for typical quantum dots functions, such as in light-emitting and bioimaging applications, owing to silicon's intrinsic merits of minimal toxicity, low cost, high abundance, easy stable functionalization. Especially nonoxidized Si NPs with a covalently bound coating serve well these respects, given the minimization surface defects upon hydrosilylation H-terminated NPs. However, date, methods obtain still not easy. Herein, we...

Singlet fission in tetracene generates two triplet excitons per absorbed photon. If these can be effectively transferred into silicon (Si), then additional photocurrent generated from photons above the bandgap of Si. This could alleviate thermalization loss and increase efficiency conventional Si solar cells. Here, we show that a change polymorphism deposited on due to air exposure facilitates transfer Magnetic field-dependent measurements confirm contribute photocurrent. The decay delayed...

The terminal alkyne-Au interaction is emerging as a promising adsorbing bonding motif for organic monolayers, allowing it to be used installing antifouling layers and/or recognition elements on gold surfaces biosensing applications. In contrast the well-known thiol-on-gold long-term hydrolytic, thermal, and electrochemical stability of bond remains relatively unexplored. Insight into these is, however, essential deliver promise (bio)sensing applications, see under which conditions they might...