منابع مشابه
Photopyroelectric detection of organic vapors
The photopyroelectric (PPE) detection of vapors under ambient conditions is demonstrated. A polymer film coated on the transducer is used as sensitive layer. Sorption within this layer binds and concentrates the vapor molecules at the detector surface. Monochromatic IR-radiation selectively excites the sorbed molecules and, therefore, the detected heat is a function of vapor concentration. Prel...
متن کاملTwo-layer model for photopyroelectric spectroscopy
This paper presents a one-dimensional theory which describes the dependence of the photopyroelectric induced signal on the optical and thermal properties of a two-layer sample, for example a thin film deposited on a substrate. Several computer simulations were performed in order to determine the validity of this model for a wide range of wavelengths and modulation frequencies.
متن کاملA cryogenic analog to digital converter operating from 300 K down to 4.4 K.
This paper presents a cryogenic successive approximation register (SAR) based analog to digital converter (ADC) implemented in a standard 0.35 microm complementary metal oxide semiconductor (CMOS) process. It operates from room temperature down to 4.4 K, achieving 10.47 effective number of bits (ENOB) at room temperature. At 4.4 K, the ADC achieves 8.53 ENOB at 50 kS/s sampling rate with a curr...
متن کاملThe Application of Solution Calorimetry to Quantify Amorphous Lactose Occurring at 10% w/w or less
Introduction The processing of crystalline pharmaceuticals is often responsible for introducing small amounts of amorphous material. This disorder often occupies only a small percentage of the total mass, and is thus apparently insignificant. However it is capable of affecting that material’s behaviour since it resides primarily on the particle surface, making that surface predominantly amorpho...
متن کاملMetallic Coulomb blockade thermometry down to 10 mK and below.
We present an improved nuclear refrigerator reaching 0.3 mK, aimed at microkelvin nanoelectronic experiments, and use it to investigate metallic Coulomb blockade thermometers (CBTs) with various resistances R. The high-R devices cool to slightly lower T, consistent with better isolation from the noise environment, and exhibit electron-phonon cooling [proportional] T(5) and a residual heat-leak ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Measurement Science and Technology
سال: 2006
ISSN: 0957-0233,1361-6501
DOI: 10.1088/0957-0233/17/12/007