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| 1 | Buffer structure optimization of the photoacoustic cell for trace gas detection显示文摘The equivalent four-pole network model is used to simulate one-dimension longitudinal acoustic resonator with different buffer diameters and lengths, aiming to reach a theoretic model which is able to estimate the optimal buffer geometry. In experiments, the buffer volumes are decreased gradually by filling a set of aluminum rings with different inner diameters and lengths into the buffers to get the desired dimensions. The experimental results show that the average deviation of 1.1% is obtained between the experimental results and the theoretical simulation at the buffer length of 30 mm. Experiments show that the minimum background signal occurs when the buffer length is equal to a quarter of the acoustic wavelength (λ/4). The amplitude of the photoacoustic signal is barely influenced when dbuf>3dres. Considering that oversize of photoacoustic cell needs more measuring gas and more material, the buffer diameter can be deduced to dbuf≈3dres. Therefore, smaller photoacoustic cell is desirable. | CAI Yang Norhana Arsad LI Min WANG Yao | 2013 | Optoelectronics Letters2013，9，3： | 6 |
| 2 | An assessment study of absorption effect:LED vs tungsten halogen lamp for noninvasive glucose detection显示文摘Noninvasive gluoose monitoring development is critical for diabetic patient continuous moni-toring.However,almost all the available devices are invasive and painful.Noninvasive methods such as using spectroscopy have shown some good results.Unfortunately,the drawback was that the tungsten halogen lamps 1usage that is impractical if applied on human skin.This paper compared the light emitting diode(LED)to traditional tungsten halogen lamps as light source for glucose detection where the type of light source plays an important role in achieving a good spectrum quality.Glucose concentration measurement has been developed as part of noninvasive technique using optical spectroscopy.Small change and overlapping in tungsten halogen results need to replace it with a more convenient light source such as LED.Based on the result obtained,the performance of LED for absorbance spectrum gives a signifcantly different and is directly proportional to the glucose concentration.The result shows a linear trend and scucssully detects lowest at 60 to 160 mg/dL glucose concentration. | Nur Ain Mohd Aziz Norhana Arsad P.Susthitha Menon Sahbudin Shaari Zalhan Md Yusof Abdur Rehman Laili | 2015 | Journal of Innovative Optical Health Sciences2015，8，2： | 2 |
| 3 | Influence of MMT as reinforcement on rheological behavior, mechanical and morphological properties of recycled PET/ABS thermoplastic nanocomposites显示文摘 | Mohd Zahidfullah Abd Razak Agus Arsad Abdul Razak Rahmat Azman Hassan | 2012 | Journal of Polymer Engineering2012，，3： | 1 |
| 4 | Unbonded post tensioning tendons and partially prestressed beams显示文摘 | Chakrabarti P R WhangT P Brown W Arsad K M Amezeua E | 1994 | ACI Structural Journal1994，91，5： | 1 |
| 5 | Security price anomalies in the London international stock exchange: a 60 year perspective显示文摘 | Arsad Z Coutts J A | 1997 | Applied Financial Economics1997，7，： | 1 |
| 6 | Security Price Anomalies in the London International Stock Exchange A 60 Year Perspective 显示文摘 | Arsad Z Coutts J A | 1997 | Applied Financial Economics1997，7，： | 1 |
| 7 | Simple design flow injection PMMA acrylic sample cell for nitrite determination显示文摘A polymethyl-methacrylate(PMMA)acrylic sample cell using flow injection is developed in this research for the determination of nitrite in an aqueous media.The research focuses on exhibiting direct absorbance spectrophotometry of nitrite using concentration of samples ranging from 0.1078 to 1.725 ppm.Nitrite determination is done colorimetrically using the Greiss reagent method.This method is based on the reaction of nitrite with sulphanilamide acid and N-1-napthylamine(NED)utilizing diazo coupling,and a syringe is used to administer the nitrite solution.The sample cell being used possesses a diameter of 1mm with an overall size of 7.35×22 mm2.To gauge the direct absorbance,a wavelength range from 400to 650 nm has been selected for the testing,and the maximum absorbance is found to be at 545 nm.The validity of the proposed cell is explained in this letter. | Faizar Abdurrahman Norhana Arsad Sabiran Harry Ramza | 2014 | Chinese Optics Letters2014，12，4： | 0 |
| 8 | Highly sensitive vector magnetic fiber sensor based on hyperbolic metamaterials显示文摘Hyperbolic metamaterials(HMMs) are novel artificial materials that excite the surface plasmon resonance(SPR) because of their unique hyperbolic dispersion properties. Herein, to the best of our knowledge, we propose the first HMM-based fiber SPR(HMM-SPR) sensor for vector magnetic detection. By selecting the composite materials and structural parameters of the HMM dispersion management, HMM-SPR sensors can achieve a high refractive index sensitivity of 14.43 μm/RIU. Vector magnetic field detection was performed with the HMM-SPR sensor encapsulated with a magnetic fluid. Compared with other ferrofluidbased magnetic field fiber sensors, the proposed sensor shows pronounced advantages in intensity and direction sensitivity of 1.307 nm/Oe and 7.116 nm/°, respectively. The sensor design approach presented in this paper provides an excellent demonstration of HMM-SPR sensors in various applications. | Shiqi Hu Junhao Liang Jiayao Chen Hongda Cheng Qianyu Lin Weicheng Shi Jinming Yuan Gui-Shi Liu Lei Chen Zhe Chen Norhana Arsad Yaofei Chen Yunhan Luo | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，11： | 0 |
| 9 | Absorption Line Profile Recovery Based on TDLS and MEMS Micro-Mirror for Photoacoustic Gas Sensing显示文摘A novel and efficient absorption line recovery technique is presented.A micro-electromechanical systems(MEMS) mirror driven by an electrothermal actuator is used to generate laser intensity modulation through the mirror reflection.Tunable diode laser spectroscopy(TDLS) and photoacoustic spectroscopy(PAS) are used to recover the target absorption line profile which is compared with the theoretical Voigt profile.The target gas is 0.01% acetylene(C2H2) in a nitrogen host gas.The laser diode wavelength is swept across the P17 absorption line of acetylene at 1 535.4 nm by a current ramp,and an erbium-doped fibre amplifier(EDFA) is used to enhance the optical intensity and increase the signal-to-noise ratio(SNR).A SNR of about 35 is obtained with 100 mW laser power from the EDFA.Good agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile. | LI Li Norhana Arsad George Stewart Deepak Uttamchandani Brian Culshaw WANG Yi-ding | 2011 | 光谱学与光谱分析2011，31，7： | 0 |
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