Microporous Sulfur–Carbon Materials with Extended Sodium Storage Window

Developing high-performance carbonaceous anode materials for sodium-ion batteries (SIBs) is still a grand quest for a more sustainable future of energy storage. Introducing sulfur within a carbon framework is one of the most promising attempts toward the development of highly efficient anode materials. Herein, a microporous sulfur-rich carbon...

Identification of carbon-containing phases in electrodeposited hard Fe–C coatings with intentionally codeposited carbon

Electrodeposition from an environmentally friendly iron sulfate electrolyte with citric acid as carbon source has gained attention recently, because of excellent mechanical properties of the resulting Fe–C coatings with intentionally codeposited high-carbon concentrations. While being very attractive as protective coatings and sustainable...

Urban Soils as Hotspots for Carbon Storage: A case study of the urban greenspaces of The Hague, the Netherlands

The services that society extracts from urban ecosystems are becoming increasingly important with increasing urbanization. A potentially crucial ecosystem service is soil carbon (C) storage, as negative soil C balances have the potential to offset some of the anthropogenic greenhouse gas emissions mitigating climate change. This research studied...

Direct Numerical Simulations of Boundary Layer Stability for Non-ideal Fluids

The process in which a smooth laminar flow transits to a chaotic to a chaotic, turbulent state, is a topic of particular interest in the sectors of energy technology and aerodynamics. To study the different paths that can be followed during the transition process, various tools and methods have been developed. A preliminary investigation of the...

Strontium, oxygen, and carbon isotope variation in modern human dental enamel

Objectives: Isotopic analyses using human dental enamel provide information on the mobility and diet of individuals in forensic and archeological studies. Thus far, no study has systematically examined intraindividual coupled strontium (Sr), oxygen (O), and carbon (C) isotope variation in human enamel or the effect that caries have on the...

Altitudinal analysis of carbon stocks in the Antisana páramo, Ecuadorian Andes

Aims The importance of quantifying carbon stocks in terrestrial ecosystems is crucial for determining climate change dynamics. However, the present regional assessments of carbon stocks in tropical grasslands are extrapolated to unsampled areas with a high degree of uncertainty and without considering the carbon and nitrogen composition of...

Synthesis of a Long Vertically Aligned Carbon Nanotube Array by Chemical Vapour Deposition

Although a lot of research has been devoted to the growth of a long Vertically Aligned Carbon Nanotube Array (VANTA), it remains difficult to find the right parameters on new systems. It has turned out that the recipe that allows the growth of Carbon Nanotube (CNT) in a particular Chemical Vapour Deposition (CVD) oven is very specific and not...

A Visual Life Cycle Analysis - for architects and policymakers

The impact of urbanizing 400 million people in China in 20 years - a comparative analysis of common structural materials with bamboo as a promising alternative for (semi) high-rise developments. Transport, End of Life scenarios and Lifespan are essential factors in a Life Cycle Analysis (LCA). The Building Energy Use itself is becoming less...

The design of a luxury superyacht tender based on the 12,3m RIB hull of Xtenders

This project started with a visit to Xtenders where a tough model of a new concept came to my attention. This sketch looked different from at the time produced by Xtenders models and evoked some curiosity that emerged into the graduation thesis. Xtender is a Dutch brand that builds yacht tenders. The main advantage of the product has been...

Feasibility study on fiber reinforced polymer cylindrical truss bridges for heavy traffic

Considering the recent increase in the use of fiber reinforced polymers in the civil engineering industry in general and in the bridge engineering industry in particular, as well as the recently more and more applied cylindrical truss bridge type, this research focuses on the question whether it is possible to combine fiber reinforced polymers...

Observation of Aharonov-Bohm conductance oscillations in a graphene ring

We investigate experimentally transport through ring-shaped devices etched in graphene and observe clear Aharonov-Bohm conductance oscillations. The temperature dependence of the oscillation amplitude indicates that below 1 K, the phase coherence length is comparable to or larger than the size of the ring. An increase in the amplitude is...

Polymeric amorphous carbon as p-type window within amorphous silicon solar cells

Amorphous carbon (a-C) has been shown to be intrinsically p-type, and polymeric a-C (PAC) possesses a wide Tauc band gap of 2.6 eV. We have replaced the p-type amorphous silicon carbide layer of a standard amorphous silicon solar cell with an intrinsic ultrathin layer of PAC. The thickness of the p layer had to be reduced from 9 to 2.5 nm in...

Length control of individual carbon nanotubes by nanostructuring with a scanning tunneling microscope

Nanofabrication of electrodes with sub-5 nm spacing for transport experiments on single molecules and metal clusters

Individual single-wall carbon nanotubes as quantum wires