Two-photon polymerisation of photosensitive materials has emerged as a very promising technique for the fabrication of photonic crystals and devices. In this paper we present our investigations into the structuring by two-photon polymerisation of a new class of photosensitive sol-gel composites exhibiting ultra-low shrinkage. We particularly focus on two composites, the first containing a zirconium alkoxide and the second a nonlinear optical molecule. The three-dimensional photonic crystal structures fabricated using these materials demonstrate high resolution and clear band- stops in the near IR region.
- Inderscience Publishers
- Three-dimensional direct writing of novel sol-gel composites for ...
Light Plants and Scene Lighting for Natural Disasters
According to the Red Cross, the recent onslaught of persistent flooding in Louisiana has surpassed the devastating floods that came with Hurricane Sandy in 2012. Without warning, the state received a whopping 6.9 trillion gallons of rainfall in one week (based on a report from CNN). Over 40,000 homes were affected by the flood, resulting $30 million in damages. Scientists speculate that more natural disasters will hit the United States from all angles in the near future, as global warming continues to cause...
Large-scale PV power plants : Maintenance Pays Off
Large-scale PV power plants are an investment in the future. Careful planning and SMA technology perfectly adapted to operator needs ensure that every plant is profitable and produces high yields. Regular maintenance is necessary to guarantee all plant components run safely and optimally, long term. They prevent smaller and larger defects from being overlooked and thus exert a considerable influence on plant operation. Here are three good reasons why maintaining a PV power plant is good practice. 1. Obtaining...
Cleantech Trends that will Change Our Future
The terms ‘ground-breaking’ or ‘game-changing’ are frequently used to describe a new technology, or to market an innovation that supposedly will change our world forever. The truth is, we seldom really know how a new technology will unfold and how, over time, it will become part of our daily lives. The personal computer, digital imaging, genetic engineering, and the Internet are but a few examples of technological advancements that have and will continue to change the way we live. The...
Variable frequency drive energy saving on air compressors
When we are looking for an innovative way to make its rotary-screw compressors more energy efficient and operator-friendly, they turned to Gozuk, Low-Voltage VFDs. In addition to supplying VFDs to control the speed and torque of the AF-series compressors, the Gozuk project team designed software to control the system pressure, air delivery, oil temperature and duty cycle directly from the VFD.VFD Payback on the system depends on the air demand; as the VFD runs the motor at lower speeds, it uses less energy....
Controlling Scale Deposition and Industrial Fouling
It costs US industry billions of dollars a year to control and remove the limescale that builds up in industrial equipment such a heat exchangers, evaporative coolers, boilers, chillers and other water fed equipment. Oil wells, for example, face significant scaling problems from the highly mineralized water that are extracted with the oil.Limescale not only increases downtime, maintenance costs and causes the early renewal of capital equipment but also increases energy usage. Scale prevention can benefit industrial...